JP7129789B2 - Head-up displays, head-up display systems, and moving objects - Google Patents

Description

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 attempts to view a display image displayed by a head-up display simultaneously with a distant external image, the external image and the display image are visually recognized because their positions in the depth direction are different. sometimes difficult. It is known to project image light emitted from a head-up display to only one eye of the user in order to make it easier for the user to visually recognize the external image and the displayed image (for example, Patent Document 1). . As a result, the depth position of the display image becomes ambiguous, so that the difficulty of visual recognition due to the difference in the depth direction position between the external image and the display image is reduced.

JP 2010-076533 A

However, when the 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, making it difficult for the user to properly view the image.

The present disclosure provides a head-up display, a head-up display system, and a moving object that allow a user to view an appropriate image and suppress crosstalk.

A 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 sub-pixels arranged in a grid pattern along a first direction and a second direction substantially orthogonal to the first direction. The optical element defines a ray direction of image light emitted from the sub-pixel for each of a plurality of band-shaped areas extending in a predetermined direction on the display surface. The projection optical system reflects the image light so that a virtual image of the image displayed on the display surface is formed. The controller controls the display surface. The band-shaped area is configured to transmit image light reaching a first eye of the user and image light reaching a second eye different from the first eye of the user by the optical element. and an emitting second visibility region. The controller causes first sub-pixels at least partially included in the first visible region to display a black image. The controller controls an image to be displayed on part of the second sub-pixels at least part of which is included in the second visible region so as to be switchable between an image for observation having arbitrary luminance and the black image. .

A 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 sub-pixels arranged in a grid pattern along a first direction and a second direction substantially orthogonal to the first direction. The optical element defines a ray direction of image light emitted from the sub-pixel for each of a plurality of band-shaped areas extending in a predetermined direction on the display surface. The projection optical system reflects the image light so that a virtual image of the image displayed on the display surface is formed. The controller controls the display surface. The band-shaped area is configured to transmit image light reaching a first eye of the user and image light reaching a second eye different from the first eye of the user by the optical element. and an emitting second visibility region. The controller causes first sub-pixels at least partially included in the first visible region to display a black image. The controller controls, of the second sub-pixels at least partially included in the second visible region, the images to be displayed in the sub-pixels adjacent to the first sub-pixels, the image for observation having an arbitrary luminance and the black image. Control switchable between

A 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 sub-pixels arranged in a grid pattern along a first direction and a second direction substantially orthogonal to the first direction. The optical element defines a ray direction of image light emitted from the sub-pixel for each of a plurality of band-shaped areas extending in a predetermined direction on the display surface. The projection optical system reflects the image light so that a virtual image of the image displayed on the display surface is formed. The controller controls the display surface. The band-shaped area is configured to transmit image light reaching a first eye of the user and image light reaching a second eye different from the first eye of the user by the optical element. and an emitting second visibility region. The controller controls a first display state and a second display state in a repeating unit of first sub-pixels at least partially included in the first visible region and second sub-pixels at least partially included in the second visible region. Control switchable between display states. The first display state is a state in which the number of sub-pixels displaying the black image is greater than the number of sub-pixels displaying 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.

A head-up display system of the present disclosure includes an illuminance meter and a head-up display. The illuminance meter 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 sub-pixels arranged in a grid pattern along a first direction and a second direction substantially orthogonal to the first direction. The optical element defines a ray direction of image light emitted from the sub-pixel for each of a plurality of band-shaped areas extending in a predetermined direction on the display surface. The projection optical system reflects the image light so that a virtual image of the image displayed on the display surface is formed. The controller controls the display surface. The band-shaped area is configured to transmit image light reaching a first eye of the user and image light reaching a second eye different from the first eye of the user by the optical element. and an emitting second visibility region. The controller causes first sub-pixels at least partially included in the first visible region to display a black image. The controller controls an image to be displayed on part of the second sub-pixels at least part of which is included in the second visible region so as to be switchable between an image for observation having arbitrary luminance and the black image. .

A 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 sub-pixels arranged in a grid pattern along a first direction and a second direction substantially orthogonal to the first direction. The optical element defines a ray direction of image light emitted from the sub-pixel for each of a plurality of band-shaped areas extending in a predetermined direction on the display surface. The projection optical system reflects the image light so that a virtual image of the image displayed on the display surface is formed. The controller controls the display surface. The band-shaped area is configured to transmit image light reaching a first eye of the user and image light reaching a second eye different from the first eye of the user by the optical element. and an emitting second visibility region. The controller causes first sub-pixels at least partially included in the first visible region to display a black image. The controller controls an image to be displayed on part of the second sub-pixels at least part of which is included in the second visible region so as to be switchable between an image for observation having arbitrary luminance and the black image. .

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

FIG. 1 is a diagram showing a schematic configuration of a head-up display system according to the first embodiment of the present disclosure. FIG. 2 is a diagram showing a schematic configuration of the head-up display shown in FIG. 1. As 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 with the left eye from the parallax barrier side. 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 left eye of the user. FIG. 9 is a diagram for explaining the first virtual image visually recognized by the user's right eye. FIG. 10 is a diagram for explaining an example of a virtual image visually recognized by each of the left eye and right eye of the user. FIG. 11 is a diagram for explaining an example in which the number of sub-pixels displaying a black image is increased and the position of the parallax barrier is changed in the example shown in FIG. FIG. 12 is a diagram for explaining another example of virtual images visually recognized by the left eye and right eye of the user. FIG. 13 is a diagram showing a schematic configuration of a head-up display system according to the second embodiment of the present disclosure;

A first embodiment of the present disclosure will be described below with reference to the drawings.

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

A head-up display system 1 according to the first embodiment includes an illuminance meter 2 and a head-up display 3, as shown in FIG. The head-up display 3 is also called HUD (Head Up Display) 3 . The head-up display system 1 may be mounted on a mobile object 100 as shown in FIG.

A “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 railroad and utility vehicles, and fixed-wing aircraft that travel on runways. Automobiles may include other vehicles that travel on roads, including but not limited to cars, trucks, buses, motorcycles, trolleybuses, and the like. 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, cultivators, transplanters, binders, combines, and lawn mowers. Industrial vehicles for construction include, but are not limited to, bulldozers, scrapers, excavators, mobile cranes, tippers, and road rollers. Vehicles include those driven by human power. Note that the classification of vehicles is not limited to the above. For example, automobiles may include road-driving industrial vehicles, and the same vehicle may be included in multiple classes. Vessels in this disclosure include marine jets, boats, and tankers. Aircraft in this disclosure includes fixed-wing and rotary-wing aircraft.

The illuminance meter 2 is arranged near a projection optical system 110 formed by the head-up display 3 and described later in detail. The illuminance meter 2 detects the illuminance of the surrounding environment of the projection optical system 110 .

As shown in FIG. 2, the HUD 3 includes a display device 4 and a projection optical system 110. As shown in FIG. 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 part of the HUD 3 may be referred to as HUD modules.

The projection optical system 110 can be configured including a first optical member 111 and a second optical member 112 . The first optical member 111 reflects the image light emitted from the display device 4 to reach a predetermined area of the second optical member 112 . The first optical member 111 may comprise 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 shown 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). . For example, the windshield of the moving body 100 may be used as the second optical member 112 of the HUD3. Therefore, the HUD 3 causes the light emitted from the display device 4 to travel along the optical path A to the left and right eyes of the user. A user can visually recognize the light arriving along the optical path A as a virtual image 120 .

The display device 4 includes an illuminator 5, a display panel 6, a parallax barrier 7 as an optical element, and a controller 8, as shown in FIG. The display device 4 is housed in the dashboard of the mobile object 100, for example.

The irradiator 5 is arranged on one side of the display panel 6 and irradiates the display panel 6 in a planar manner. The illuminator 5 may include a light source, a light guide plate, a diffusion plate, a diffusion sheet, and the like. The irradiator 5 emits irradiation light from a light source, and uniforms the irradiation light in the surface direction of the display panel 6 with a light guide plate, a diffusion plate, a diffusion sheet, and the like. The illuminator 5 then emits uniformized light toward the display panel 6 .

The display panel 6 may employ a display panel such as a transmissive liquid crystal display panel. The display panel 6 has a plate-shaped display surface 61 . The display surface 61, as shown in FIG. 3, has a plurality of sub-pixels arranged in a grid pattern 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 the 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 drawings, 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 sub-pixel corresponds to one of colors R (Red), G (Green), and B (Blue). A set of three sub-pixels of R, G, and B can constitute one pixel. One pixel can be called one pixel. The horizontal direction is, for example, the direction in which a plurality of sub-pixels forming one pixel are arranged. The vertical direction is, for example, the direction in which sub-pixels 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. Transmissive display panels include MEMS (Micro Electro Mechanical Systems) shutter type display panels in addition to liquid crystal panels. Self-luminous display panels include organic EL (electro-luminescence) and inorganic EL display panels. If the display panel 6 is a self-luminous display panel, the display device 4 does not have to include the illuminator 5 .

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) (hereinafter, n×b=m) sub-pixels P1 to Pm which are n in the horizontal direction, b in the vertical direction, and are arranged continuously. including. The second sub-pixel group Pg2 is horizontally adjacent to the first sub-pixel group Pg1. The second sub-pixel group Pg2 includes m sub-pixels P(m+1) to P(2×m) which are horizontally n in number and vertically b in number. Therefore, if the horizontal length of the sub-pixel is Hp and the vertical length is Vp, the image pitch k, which is the horizontal arrangement interval between the first sub-pixel group Pg1 and the second sub-pixel group Pg2, is It is represented as k=2*n*Hp.

In the example shown in FIG. 3, the first sub-pixel group Pg1 includes four sub-pixels P1 to P4 arranged consecutively, two horizontally and two vertically. The second sub-pixel group Pg2 includes four sub-pixels P5 to P8, two in the horizontal direction and two in the vertical direction, which are continuously arranged. Therefore, n=2 and the image pitch k is k=2*n*Hp=2*2*Hp=4*Hp.

The parallax barrier 7 is positioned on the opposite side of the display panel 6 from the illuminator 5 at a predetermined distance, as shown in FIG. The parallax barrier 7 has a strip-shaped light blocking surface 71 as shown in FIG. 4 that blocks image light. The parallax barrier 7 has a plurality of light blocking surfaces 71 . The parallax barrier 7 defines a translucent region 72 between two light shielding surfaces 71 adjacent to each other among the plurality of light shielding surfaces 71 . The light-transmitting regions 72 and the light-shielding surfaces 71 are alternately arranged in a direction orthogonal to the direction in which the light-transmitting regions 72 and the light-shielding surfaces 71 extend. The ends of the translucent area 72 define the light beam direction of the image light emitted from the sub-pixels for each of a plurality of band-like areas extending in a predetermined direction inclined with respect to the y-axis on the display surface 61 . The edge of the strip crosses over a plurality of sub-pixels, and the length of the one-pixel section in the horizontal direction is shorter than the length of the one-pixel section in the vertical direction.

If the line indicating the edge of the light-transmitting region 72 extends in the vertical direction, an error included in the arrangement of the sub-pixels or the dimension of the light-transmitting region 72 makes moiré easily recognizable in the displayed image. When the line indicating the edge of the light-transmitting region 72 extends in a direction having a predetermined angle with respect to the vertical direction, the displayed image is Moire becomes difficult to recognize.

The translucent area 72 has a higher light transmittance than the light shielding surface 71 . The light-shielding surface 71 has a lower light transmittance than the light-transmitting region 72 . The light-transmitting region 72 transmits light incident on the parallax barrier 7 . The translucent region 72 may transmit light with a transmissivity equal to or higher than the first predetermined value. The first predetermined value may be, for example, 100% or a value close to 100%. The first predetermined value can be a value of 100% or less, such as 80% or 50%, as long as the image light emitted from the display surface 61 can be visually recognized. The light shielding surface 71 is a portion that shields and does not transmit light incident on the parallax barrier 7 . In other words, the light blocking surface 71 blocks the image displayed on the display device 10 . The light blocking surface 71 may block light with a transmittance equal to or lower than the second predetermined value. The second predetermined value may be, for example, 0% or a value close to 0%.

The light shielding surface 71 may be composed of a film or plate-like member having a transmittance of less than the second predetermined value. The light-transmitting region 72 is composed of an opening provided in a film or plate-like member. The film may be made of resin, or may be made of other materials. The plate-shaped member may be made of resin, metal, or the like, or may be made of another material. The parallax barrier 7 is not limited to a film or plate-like member, and may be composed of other types of members. The parallax barrier 7 may have a light-shielding base material, or may contain a light-shielding additive in the base material. The parallax barrier 7 can have a structure in which a light-shielding member partially overlaps a light-transmitting base material. The parallax barrier 7 may have a structure in which a light-shielding member is added to a part of a translucent base material.

The parallax barrier 7 may be composed of a liquid crystal shutter. The liquid crystal shutter can control the transmittance of light according to the applied voltage. The liquid crystal shutter may be composed of a plurality of pixels and control the light transmittance of each pixel. The liquid crystal shutter can form a region with high light transmittance or a region with low light transmittance in any shape. When the parallax barrier 7 is composed of a liquid crystal shutter, the translucent area 72 may be an area having a transmittance equal to or higher than the first predetermined value. When the parallax barrier 7 is composed of liquid crystal shutters, the light shielding surface 71 may be an area having a transmittance equal to or lower than the second predetermined value. The parallax barrier 7 includes a shutter panel that can be changed between a light transmitting state and a light blocking state for each minute area. 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 changes the light beam direction, which is the propagation direction of the image light emitted from the sub-pixels, for each of a plurality of band-like regions extending in a predetermined direction within the display surface 61 . Specifically, the parallax barrier 7 allows part of the image light emitted from the display surface 61 to pass through the light-transmitting region 72 so that the image light reaches the position of the user's left eye. 2 propagate to the optical member 112; The parallax barrier 7 transmits another part of the image light emitted from the display surface 61 through the light-transmitting region 72, thereby allowing the image light to reach the position of the user's right eye. 112. The second optical member 112 allows the image light whose 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 sub-pixels P1 to P4 included in the left-eye visible region 61L (first visible region) of the display surface 61 shown in FIG. It reaches the user's left eye via 110 . The image light emitted from the sub-pixels P5 to P8 included in the left-eye light shielding region 62L, which is the region other than the left-eye visible region 61L, does not reach the user's left eye. The 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. reach the eye. The image light emitted from the sub-pixels P1 to P4 included in the right-eye light shielding region 62R, which is the region other than the right-eye visible region 61R, does not reach the user's right eye. Therefore, as shown in FIG. 7, the user apparently sees a second virtual image 700, which is a virtual image of the parallax barrier 7, prescribing the direction of the image light from the first virtual image 600. Recognize images. In this embodiment, the front is the direction of the second optical member 112 as viewed from the user. Forward is the direction in which mobile object 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 FIGS. 8 and 9 , the portion where the first virtual image 600 is not visually recognized due to the image light being blocked by the light shielding surface 71 is indicated by diagonal lines, and is hereinafter referred to as the virtual image 701 of the light shielding surface 71 . First virtual image 600 includes a portion of virtual image sub-pixels P′ 1 to P′ 8 that are virtual images of sub-pixels P 1 to P 8 on display surface 61 . In this embodiment, the horizontal length of the virtual image sub-pixels P'1 to P'8 is VHp, and the vertical length is VVp.

Part of the image light emitted from the display surface 61 is transmitted through the translucent area 72 of the parallax barrier 7, reflected by the projection optical system 110 as described above, and reaches the left eye. As a result, the user's left eye visually recognizes a virtual image 601L in the left-eye visible region 61L, which is part of the first virtual image 600, as shown in FIG. Image light emitted from the display surface 61 other than the image light reaching the left eye is blocked by the light blocking surface 71 of the parallax barrier 7 . As a result, ideally, the left eye does not visually recognize the virtual image 602L in the left-eye light-shielding region 62L, which is the region other than the virtual image 601L in 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 passes through the translucent area 72 of the parallax barrier 7, is reflected by the projection optical system 110 as described above, and reaches the right eye. to reach As a result, as shown in FIG. 9, the user's right eye sees a virtual image 601R in the right-eye visible region 61R that is apparently part of the first virtual image 600 and is different from the virtual image 601L in the left-eye visible region 61L. Visualize. Image light other than the image light emitted from the display surface 61 and reaching the right eye is blocked by the light blocking surface 71 of the parallax barrier 7 . As a result, the right eye does not visually recognize the virtual image 602R in the right-eye shielding area 62R, which is an area other than the virtual image 601R in the right-eye visible area 61R in the first virtual image 600 .

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

Therefore, first, the relationship between the first virtual image 600, the second virtual image 700, and the suitable viewing distance VD will be described. The suitable viewing distance VD is the distance between the second virtual image 700 and the user's eyes. For convenience of explanation, the subsequent explanation will be made using FIG. , is much larger than the ratio of the distances shown in FIG.

As shown in FIG. 7, the following equations (1) and (2) are established using the virtual image barrier pitch VBp, the virtual image gap Vg, and the interocular distance E between the user's right and left eyes. is designed to The virtual image barrier pitch VBp is the arrangement interval of the virtual images 701 on the light shielding surface 71 in the direction corresponding to the first direction. A virtual image gap Vg is the distance between the second virtual image 700 and the first virtual image 600 . The virtual image pitch Vk is the horizontal arrangement interval between the virtual image of the first sub-pixel group Pg1 and the virtual image of the second sub-pixel 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 preferred viewing distance VD, the virtual image gap Vg, and the virtual image pitch Vk so that the virtual image 601L in the left-eye visible region 61L and the virtual image 601R in 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 translucent region 72 in the second virtual image 700 .

Image pitch k, barrier pitch Bp, barrier opening width Bw, and gap g in display device 4 are defined so that virtual image barrier pitch VBp, virtual image gap Vg, virtual image barrier opening width VBw, and virtual image pitch Vk satisfy the above conditions. be 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 as well.

The controller 8 is connected to each component of the display device 4 and controls each component. The controller 8 is configured, for example, as a processor. Controller 8 may include one or more processors. The processor may include a general-purpose processor that loads a specific program to perform a specific function, and a dedicated processor that specializes in specific processing. A dedicated processor may include an Application Specific Integrated Circuit (ASIC). The processor may include a programmable logic device (PLD). The PLD may include an FPGA (Field-Programmable Gate Array). The controller 8 may be either a SoC (System-on-a-Chip) or a SiP (System In a Package) with which one or more processors cooperate. The controller 8 may include a storage unit, and may store various information, a program for operating each component of the display device 4, or the like in the storage unit. The storage unit may be composed of, for example, a semiconductor memory or the like.

Here, processing executed by the controller 8 will be described in detail. The controller 8 controls 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 user's operation. Specifically, the display device 4 displays 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 the monocular image. The display device 4 can switch the display image between the monocular image and the two-dimensional image and/or the three-dimensional image based on the control signal.

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

The controller 8 displays a black image on sub-pixels (first sub-pixels) at least partially included in the left-eye visible region 61L that emits image light that passes through the translucent region 72 and reaches the left eye of the user. Let A black image is, for example, 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 displayable gradation levels of the sub-pixels or the luminance of a gradation based thereon. The controller 8 causes sub-pixels (second sub-pixels) at least partially included in the right-eye visible region 61R, which emits image light that passes through the translucent region 72 and reaches the right eye, to display an observation image. A viewing image is an image with arbitrary luminance to be viewed by the user's right eye. The first sub-pixel corresponds to the sub-pixels included in the first sub-pixel group Pg1 described above. The second sub-pixels correspond to the sub-pixels included in the above-described second sub-pixel group Pg2.

Specifically, the controller 8 causes the sub-pixels P1 to P4 at least partially included in the left-eye visible region 61L to display a black image as shown in FIG. In the drawing, sub-pixels displaying a black image are marked with symbols P1 to P8 and the symbol “(B)”. Accordingly, as shown in FIG. 8, the left eye of the user does not perceive the virtual image at the positions of the virtual image sub-pixels P'1 to P'4. In the drawing, the virtual image sub-pixels corresponding to the sub-pixels P1-P8 displaying the black image are denoted by the symbols P'1-P'8 and the symbol "(B)". As described above, the black image is a value corresponding to the luminance of the lowest gradation among the gradation levels that can be displayed by the sub-pixels or the luminance of the gradation corresponding thereto. Therefore, when the user looks through the second optical member 112 in the direction corresponding to the black image, the user sees only objects on the opposite side of the second optical member 11 to the user. can see That is, the user does not visually recognize the virtual image at the positions corresponding to the sub-pixels displaying the black image. In this embodiment, in order to simplify the explanation, the position corresponding to the sub-pixel displaying the black image will be explained as the position of the virtual image sub-pixel.

The controller 8 causes the sub-pixels P5 to P8 at least partially included in the left-eye shielding region 62L to display an observation image as shown in FIG. As a result, as shown in FIG. 6, the observation image is displayed in the sub-pixels P5 to P8 at least partially included in the right-eye visible region 61R. Therefore, as shown in FIG. 9, the user's right eye visually recognizes the virtual image of the observation image formed in the virtual image sub-pixels P'5 to P'8 of the virtual image 601R in the right-eye visible region 61R.

Therefore, the user visually recognizes 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 image for observation, and it becomes easier for the user to visually recognize the virtual image at the same time as an object farther than the virtual image.

At this time, ideally, the user's left eye does not visually recognize the virtual image of the image for observation displayed in the left-eye shielding region 62L. However, in reality, the image light from the left-eye light shielding region 62L of the display surface 61 may leak from the light shielding 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 sub-pixels P'5 to P'8 included in the virtual image 602L of the left-eye light shielding region 62L. Therefore, the inventors have found that the left eye sees the image for observation that should be seen only by the right eye, and crosstalk occurs. In particular, the inventors have found that image light from sub-pixels in the left-eye light-shielding region 62L closer to the left-eye visible region 61L is more likely to leak from the light-shielding surface 71 . The inventors have found that the lower the illuminance of the surrounding environment, the easier it is for the user's left eye to visually recognize a virtual image due to image light leaking from the left-eye light-shielding region 62L, which greatly affects the occurrence of crosstalk. .

Therefore, the controller 8 causes the first sub-pixel to display a black image, acquires the illuminance measured by the illuminance meter 2, and controls the second sub-pixel based on the illuminance. Specifically, the controller 8 controls the image to be displayed on part of the second sub-pixels, at least part of which is included in the right-eye visible region 61R, to be switchable between the image for observation and the black image. At this time, the controller 8 causes the observation image to be displayed on the sub-pixels that do not display the black image among the second sub-pixels.

In other words, the controller 8 controls the display state of the display surface 61 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 sub-pixels displaying a black image is greater than the number of sub-pixels displaying an observation image in a repeating unit of first sub-pixels and second sub-pixels. 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.

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

(When the illuminance is equal to or higher than the first illuminance)
When the illuminance measured by the illuminance meter 2 is equal to or greater than the first illuminance, the controller 8 causes the first sub-pixel to display a black image 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 not recognized by the user. The controller 8 causes the second sub-pixels to display the image for observation.

(When the illuminance is less than the first illuminance and greater than or equal to the second illuminance)
If the illuminance measured by the illuminance meter 2 is less than the first illuminance and equal to or greater than the second illuminance that is lower than the first illuminance, the controller 8 causes the first sub-pixel to display a black image as described above. The second illuminance is an illuminance lower than the first illuminance. The second illuminance is an illuminance within an illuminance range in which crosstalk caused by leakage of image light from the image for observation is recognized by the user. The second illuminance is the lowest illuminance in the illuminance range in which crosstalk due to leakage of image light from the observation image is not recognized by the user when part of the observation image is changed to a black image. .

The controller 8 causes at least one of the second sub-pixels in the minimum repeating unit of the first sub-pixels and the second sub-pixels to display a black image. The minimum repeating unit is the minimum unit in which the first sub-pixels and the second sub-pixels are repeatedly arranged. Inclusive range.

Specifically, the controller 8 may cause a black image to be displayed in the sub-pixels adjacent to the first sub-pixels among the second sub-pixels. The controller 8 may cause the sub-pixel closest to the left-eye visible region 61L to display a black image among the second sub-pixels. If there are a plurality of sub-pixels closest to the left eye visible region 61L among the second sub-pixels, the controller 8 causes the sub-pixels closest to the right eye to display a black image. you can If there are a plurality of sub-pixels closest to the left-eye visible region 61L among the second sub-pixels, the controller 8 may display a black image on the plurality of sub-pixels.

In the example shown in FIGS. 5 and 6, controller 8 may cause sub-pixel P5 to display a black image in addition to sub-pixels P1-P4. As a result, the user's left eye does not perceive the virtual image at the positions of the virtual image sub-pixels P'1 to P'4, as shown in FIG. Even if image light leaks from the left-eye light shielding region 62L at this time, the user's left eye does not visually recognize the virtual image at the position of the virtual image sub-pixel P'5. Therefore, it is possible to prevent a virtual image of the observation image from being visually recognized by the user's left eye due to leakage of the image light of the observation image. Therefore, the occurrence of crosstalk can be suppressed.

At this time, the controller 8 causes the observation image to be displayed on the sub-pixels that do not display the black image among the second sub-pixels. In the examples shown in FIGS. 5 and 6, the controller 8 may cause the sub-pixels P6 to P8 of the sub-pixels P5 to P8 to display the observation image. As a result, as shown in FIG. 10, the user's right eye visually recognizes the virtual image of the observation image formed on the virtual image sub-pixels P'6 to P'8. The user's right eye does not perceive the virtual image at the virtual image sub-pixel P'5. In this case, there is a concern that visibility may be lowered due to a decrease in the virtual image of the observation image viewed 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 for observation even if the amount of image light is small. Therefore, deterioration in the visibility of the virtual image of the observation image can be suppressed.

Further, the controller 8 may control the parallax barrier 7 when the parallax barrier 7 is the liquid crystal shutter described above. Specifically, as shown in FIG. 11, the controller 8 arranges the parallax barrier 7 so that the center of the left-eye visible area 61L is positioned at the horizontal center of the area where the black image is displayed. you can As a result, the sub-pixel closest to the left-eye visible region 61L, which displays the image for observation, is separated from the left-eye visible region 61L. Therefore, crosstalk due to leakage of observation images can be further reduced.

(When the illuminance is less than the second illuminance)
When the illuminance measured by the illuminance meter 2 is less than the second illuminance, the controller 8 causes the first sub-pixel to display a black image as described above. The controller 8 causes more sub-pixels of the second sub-pixels to display a black image than when the illuminance is equal to or greater than the second illuminance and less than the first illuminance.

In the example shown in FIGS. 5 and 6, controller 8 may cause sub-pixels P5 and P8 to display a black image in addition to sub-pixels P1-P4. As a result, the user's left eye does not perceive the virtual image at the positions of the virtual image sub-pixels P'1 to P'4, as shown in FIG. Even if the image light leaks from the left-eye light shielding region 62L at this time, the user's left eye does not visually recognize the virtual image at the positions of the virtual image sub-pixels P'5 and P'8. Therefore, it is possible to further prevent a virtual image of the observation image from being visually recognized by the user's left eye due to leakage of the image light of the observation image. Therefore, the occurrence of crosstalk can be further suppressed.

At this time, the controller 8 causes the observation image to be displayed on the sub-pixels that do not display the black image among the second sub-pixels. For example, in the examples shown in FIGS. 5 and 6, the controller 8 may cause the sub-pixels P6 and P7 out of the sub-pixels P5 to P8 to display the observation image. As a result, as shown in FIG. 12, the user's right eye visually recognizes the virtual image of the observation image formed in the virtual image sub-pixels P'6 and P'7 of the virtual image 602L in the left light-shielding region. The user's right eye does not see a virtual image at virtual image sub-pixels P'5 and P'8. In this case, there is a concern that visibility may be lowered due to a decrease in the virtual image of the observation image viewed 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. Therefore, deterioration in the visibility of the virtual image of the observation image can be suppressed.

Next, the control by which the controller 8 displays a two-dimensional image will be described.

If the display device 4 can switch between displaying a monocular image and a two-dimensional image, the parallax barrier 7 is composed of liquid crystal shutters that can be controlled by the controller 8 . The controller 8 causes the display panel 6 to display a two-dimensional image without parallax. The controller 8 does not provide the light shielding surface 71 on the parallax barrier 7 . Specifically, the controller 8 uniformly sets the transmittance of the liquid crystal shutters forming the parallax barrier 7 to be approximately the same as the transmittance of the translucent areas 72 . Thereby, the image light of the two-dimensional image emitted from the display surface 61 reaches both the right eye and the left eye of the user. Therefore, the user's right eye and left eye each see the same two-dimensional image.

Next, the control by which the controller 8 displays a three-dimensional image will be described.

The controller 8 causes the first sub-pixels at least partially included in the left-eye visible region 61L to display the left-eye image. The controller 8 causes the second sub-pixels at least partially included in the right-eye visible region 61R to display the right-eye image. The left-eye image and the right-eye image are images having parallax with each other. The left eye image is viewed with the left eye and the right eye image is viewed with the right eye, so that the user recognizes an image with a stereoscopic effect.

As described above, in displaying a monocular image in the first embodiment, the controller 8 causes the first sub-pixels at least partially included in the left-eye visible region 61L to display a black image. The controller 8 performs control so that an image displayed on part of the second sub-pixels, at least part of which is included in the right-eye visible region 61R, can be switched between an image for observation and a black image. Therefore, the amount of image light of the observation image that leaks from the light shielding surface 71 can be controlled. Therefore, the amount of image light of the image for observation transmitted to the left eye of the user is controlled, and the image for observation viewed by the left eye together with the black image can be suppressed. This can suppress the occurrence of crosstalk.

In order to suppress 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, the parallax barrier 7 needs to be precisely controlled. 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 sub-pixel. In contrast, in the first embodiment, the observation image or the black image may be displayed in any of the second sub-pixels included in the left-eye light-shielding region 62L. Sophisticated control is not required compared to changing . Therefore, the occurrence of crosstalk can be easily suppressed.

Also, in the first embodiment, the controller 8 controls the image displayed on the second sub-pixels based on the illuminance measured by the illuminance meter 2 . Human eyes are more likely to recognize observation images when the illuminance of the surrounding environment is lower. Therefore, by displaying a black image or an ornamental image on the second sub-pixel based on the illuminance, the crosstalk is appropriately suppressed and the ornamental image is reliably viewed by the right eye. be able to.

Also, in the first embodiment, the controller 8 causes at least one of the second sub-pixels in the minimum repeating unit of the first sub-pixel and the second sub-pixel to be black when the illumination is less than the first illumination. display an image. The controller 8 causes the observation image to be displayed on the sub-pixels that do not display the black image among the second sub-pixels. Therefore, it is possible to prevent a virtual image of the observation image from being visually recognized by the user's left eye due to leakage of the image light of the observation image. Therefore, the occurrence of crosstalk can be suppressed. Furthermore, the lower the illuminance of the surrounding environment, the easier it is to see the image even if the amount of image light is small. can be prevented from being done.

Further, in the first embodiment, the controller 8 causes the sub-pixel closest to the left-eye visible region 61L among the second sub-pixels to display a black image. The closer the sub-pixel of the left-eye light-shielding region 62</b>L is to the left-eye visible region 61</b>L, the easier it is for the image light from the sub-pixel to leak through the light-shielding surface 71 . Therefore, compared to the case where a black image is displayed in other sub-pixels of the left-eye visible region 61L, it is possible to further suppress the virtual image of the observation image from being visually recognized by the user's left eye. Therefore, the occurrence of crosstalk can be suppressed.

Further, in the first embodiment, when the illuminance is less than a second illuminance that is lower than the first illuminance, the controller 8 controls the second sub-pixels so that the illuminance is greater than or equal to the second illuminance. display a black image on the sub-pixels of Leakage of the image light of the observation image can further prevent a virtual image of the observation image from being visually recognized by the user's left eye. Therefore, the occurrence of crosstalk can be further suppressed. 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, even if the amount of image light of the image for observation is reduced, the visibility of the virtual image of the image for observation by the right eye is reduced. can be prevented.

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

A head-up display system 1 according to the second embodiment of the present disclosure includes an illuminance meter 2 and a head-up display 3, as shown in FIG. A head-up display system 1 according to the second embodiment differs from the first embodiment in that a detection device 9 is further provided. In the second embodiment, only configurations different from the first embodiment will be described. The configuration of the second embodiment, the description of which is omitted, is the same as that of the first embodiment.

The detection device 9 detects the position of either one of the user's left eye and right eye and outputs it to the controller 8 . The detection device 9 may for example comprise a camera. 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 the image captured by 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 an image captured by 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 images captured by two or more cameras.

The detection device 9 may be connected to an external camera without a camera. The detection device 9 may have an input terminal for inputting a signal from a camera outside the device. A camera outside the device may be directly connected to the input terminal. A camera outside the device may be indirectly connected to the input terminal via a shared network. A detection device 9 without a camera may have an input terminal to which the camera inputs the video signal. The detection device 9 without 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, for example, comprise a sensor. The sensor may be an ultrasonic sensor, an optical sensor, or the like. The detection device 9 may detect the position of the user's head using a sensor, and 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 using 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 the position of at least one of the left eye and the right eye.

The head-up display system 1 does not have to include the detection device 9 . If the display device 4 does not have the detection device 9, the controller 8 may have an input terminal for inputting a signal from the detection device outside the device. A sensing device external to the device may be connected to the input terminal. A detection device external to the device may use electrical and optical signals as transmission signals to the input terminals. A sensing device external to 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 obtained from a detection device outside the device.

The controller 8 determines the positions of the left-eye visible region 61L and the right-eye visible region 61R based on the illuminance measured by the illuminance meter 2 and the position of the user's eyes detected by the detection device 9 .

When the position of the user's eyes 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 position. Then, the controller 8 may determine the positions of the left-eye visible area 61L and the right-eye visible area 61R based on the positions of the virtual image 601L of the left-eye visible area 61L and the virtual image 601R of the right-eye visible area 61R.

The method by which the controller 8 controls the image displayed on each sub-pixel based on the illuminance is the same as in the first embodiment. In the first embodiment, based on the position of the left-eye visible region 61L when the user's eyes are at the reference position, the controller 8 controls the second sub-pixels at least partially included in the left-eye light-shielding region 62L. to control. In contrast, in the second embodiment, the controller 8 controls the second sub-pixels based on the position of the left-eye visible region 61L determined based on the position of the user's eyes detected by the detector 9. do. Therefore, even when the position of the user's eye is displaced from the reference position, the position of the virtual image 601 in the left-eye visible region 61L can be accurately determined. Along with this, the black image and the observation image can be appropriately displayed for the user's left eye and right eye, respectively, based on the position of the left-eye visible region 61L.

Although the above embodiments have been described as representative examples, it will be apparent to those skilled in the art that many modifications and substitutions may be made within the spirit and scope of the invention. Therefore, this invention should not be construed as limited by the above-described embodiments, and various modifications and changes are possible without departing from the scope of the claims. For example, it is possible to combine a plurality of configuration blocks described in the embodiments and examples into one, or divide one configuration block.

In each of the above-described embodiments, the display device 4 includes the parallax barrier 7 as an optical element, but the present invention is not limited to this. For example, the display device 4 may include a lenticular lens as an optical element. In this case, the lenticular lens, like the parallax barrier 7, defines the traveling direction of the image light emitted from the sub-pixels P1 to P4 included in the left-eye visible region 61L, and passes through the projection optical system 110. Make it 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. reach the right eye.

1, 10 head-up display system 2 illuminance measuring instrument 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 area 61R right eye visible area 62L left eye light shielding Region 62R Right-eye light-shielding region 71 Light-shielding surface 72 Light-transmitting region 100 Moving body 110 Projection optical system 111 First optical member 112 Second optical member 120 Virtual image 600 First virtual image 601L Left-eye visible region virtual image 601R Right-eye visible region virtual image 602L Virtual image of left eye shielding area 602R Virtual image of right eye shielding area 700 Second virtual image 701 Virtual image of shielding surface

Claims (11)

a display surface having a plurality of sub-pixels arranged in a grid pattern along a first direction and a second direction substantially orthogonal to the first direction;
an optical element that defines a ray direction of image light emitted from the sub-pixel for each of a plurality of band-shaped areas extending in a predetermined direction on the display surface;
a projection optical system that reflects the image light so that a virtual image of the image displayed on the display surface is formed;
a controller that controls the display surface;
with
The band-shaped area is configured to transmit image light reaching a first eye of the user and image light reaching a second eye different from the first eye of the user by the optical element. and an emitting second visible region, wherein the plurality of sub-pixels is a plurality of first sub-pixels, wherein at least a portion of each first sub-pixel is included in the first visible region. and a plurality of second sub-pixels, wherein at least a portion of each second sub-pixel is included in the second visible region, the controller comprising: the plurality of first sub-pixels; Displaying a black image on the sub-pixels, acquiring the illuminance of the surrounding environment of the projection optical system, and based on the illuminance, displaying the image on some of the plurality of second sub-pixels with arbitrary luminance. control so as to be switchable between the observation image and the black image;
The controller controls at least one of the plurality of second sub-pixels in a minimum repeating unit of the plurality of first sub-pixels and the plurality of second sub-pixels when the illuminance is less than the first illuminance. A head-up display that displays the black image, and displays the observation image on sub-pixels that do not display the black image among the plurality of second sub-pixels. The head-up display according to claim 1, wherein the controller displays the black image on a sub-pixel closest to the first visible region among the plurality of second sub-pixels. If there is a plurality of sub-pixels closest to the first visible region among the plurality of second sub-pixels, the controller controls, among the plurality of sub-pixels closest to the first visible region, the 3. A head-up display according to claim 2, wherein a black image is displayed in sub-pixels closer to the second eye. If there are a plurality of sub-pixels closest to the first visible region among the plurality of second sub-pixels, the controller causes the plurality of sub-pixels closest to the first visible region to display a black image. The head-up display according to claim 2, which is displayed. When the illuminance is less than a second illuminance that is lower than the first illuminance, the controller compares the illuminance of the plurality of second sub-pixels to a case where the illuminance is greater than or equal to the second illuminance and less than the first illuminance. 5. The head-up display according to any one of claims 1 to 4, wherein the black image is displayed on many second sub-pixels. The controller determines that the center of the first visible region in the first direction is the first visible region of the region formed of the part of the plurality of first sub-pixels and the plurality of second sub-pixels displaying the black image. The head-up display according to any one of claims 1 to 5, wherein the optical element is controlled so as to be centered in a direction. The controller determines the first visible region based on the position of the user's eye, displays a black image on the plurality of first sub-pixels based on the position of the first visible region, and displays the plurality of first sub-pixels. 7. A head-up display according to claim 6, which controls the second sub-pixel of . a display surface having a plurality of sub-pixels arranged in a grid pattern along a first direction and a second direction substantially orthogonal to the first direction;
an optical element that defines a ray direction of image light emitted from the sub-pixel for each of a plurality of band-shaped areas extending in a predetermined direction on the display surface;
a projection optical system that reflects the image light so as to form a virtual image of the image displayed on the display surface;
a controller that controls the display surface;
with
The band-shaped area is configured to transmit image light reaching a first eye of the user and image light reaching a second eye different from the first eye of the user by the optical element. and an emitting second visible region, wherein the plurality of sub-pixels is a plurality of first sub-pixels, wherein at least a portion of each first sub-pixel is included in the first visible region. and a plurality of second sub-pixels, wherein at least a portion of each second sub-pixel is included in the second visible region, the controller comprising: the plurality of first sub-pixels; Displaying a black image on the sub-pixels, acquiring the illuminance of the surrounding environment of the projection optical system, and displaying on the sub-pixels in contact with the first sub-pixels among the plurality of second sub-pixels based on the illuminance. controlling the image to be displayed so that it can be switched between an observation image having arbitrary luminance and the black image;
The controller controls at least one of the plurality of second sub-pixels in a minimum repeating unit of the plurality of first sub-pixels and the plurality of second sub-pixels when the illuminance is less than the first illuminance. A head-up display that displays the black image, and displays the observation image on sub-pixels that do not display the black image among the plurality of second sub-pixels. a display surface having a plurality of sub-pixels arranged in a grid pattern along a first direction and a second direction substantially orthogonal to the first direction;
an optical element that defines a ray direction of image light emitted from the sub-pixel for each of a plurality of band-shaped areas extending in a predetermined direction on the display surface;
a projection optical system that reflects the image light so as to form a virtual image of the image displayed on the display surface;
a controller that controls the display surface;
with
The band-shaped area is configured to transmit image light reaching a first eye of the user and image light reaching a second eye different from the first eye of the user by the optical element. and an emitting second visible region, wherein the plurality of sub-pixels is a plurality of first sub-pixels, wherein at least a portion of each first sub-pixel is included in the first visible region. and a plurality of second sub-pixels, wherein at least a portion of each second sub-pixel is included in the second visible region, the controller comprising: the plurality of first sub-pixels; a first display state in which the number of sub-pixels displaying a black image is greater than the number of sub-pixels displaying an observation image in a repeating unit of the sub-pixel and the plurality of second sub-pixels; and displaying the black image. switchable between a second display state in which the number of sub-pixels displayed is the same as the number of sub-pixels displaying the observation image;
The controller acquires the illuminance of the surrounding environment of the projection optical system, and if the illuminance is less than a first illuminance, the controller obtains the A head-up display that displays the black image on at least one of a plurality of second sub-pixels, and displays the observation image on sub-pixels that do not display the black image among the plurality of second sub-pixels. A display surface having a plurality of sub-pixels arranged in a grid along a first direction and a second direction substantially orthogonal to the first direction, and a plurality of band-shaped regions extending in a predetermined direction on the display surface, an optical element for defining a light beam direction of image light emitted from the sub-pixel; a projection optical system for reflecting the image light so as to form a virtual image of an image displayed on the display surface; and the display surface. and a controller for controlling, wherein the band-shaped region includes a first visible region for emitting image light reaching a first eye of the user by the optical element, and a second visible region different from the first eye of the user. and a second visible region for emitting image light reaching two eyes, wherein the plurality of sub-pixels is a plurality of first sub-pixels, and at least a portion of each first sub-pixel is in the first visible region. and a plurality of second sub-pixels, wherein at least part of each second sub-pixel is included in the second visible region. up display and
an illuminance meter that measures the illuminance of the surrounding environment of the projection optical system,
The controller causes first sub-pixels at least partially included in the first visible region to display a black image, and at least partially in the second visible region based on the illuminance measured by the illuminance meter. The image to be displayed in a part of the second sub-pixels containing is switchable between an image for observation having arbitrary luminance and the black image, and the controller controls the illuminance to be less than the first illuminance In one case, causing at least one of the plurality of second sub-pixels in a minimum repeating unit of the plurality of first sub-pixels and the plurality of second sub-pixels to display the black image; A head-up display system that displays the observation image on sub-pixels that do not display the black image among sub-pixels. A display surface having a plurality of sub-pixels arranged in a grid along a first direction and a second direction substantially orthogonal to the first direction, and a plurality of band-shaped regions extending in a predetermined direction on the display surface, an optical element for defining a light beam direction of image light emitted from the sub-pixel; a projection optical system for reflecting the image light so as to form a virtual image of an image displayed on the display surface; and the display surface. and a controller for controlling, wherein the band-shaped region includes a first visible region for emitting image light reaching a first eye of the user by the optical element, and a second visible region different from the first eye of the user. and a second visible region for emitting image light reaching two eyes, wherein the plurality of sub-pixels is a plurality of first sub-pixels, and at least a portion of each first sub-pixel is in the first visible region. and a plurality of second sub-pixels, wherein at least a portion of each second sub-pixel is included in the second visible region, said The controller causes the plurality of first sub-pixels to display a black image, acquires the illuminance of the surrounding environment of the projection optical system, and causes some of the plurality of second sub-pixels to display the image based on the illuminance. controlling an image to be switchable between an image for observation having arbitrary luminance and the black image, and controlling the plurality of first sub-pixels and the plurality of causing at least one of the plurality of second sub-pixels to display the black image, and among the plurality of second sub-pixels, sub-pixels that do not display the black image in the minimum repeating unit of the second sub-pixels of A moving object comprising a head-up display for displaying the observation image.

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