JP2022143645A - Display device - Google Patents

Abstract

To provide a display device that does not cause reduction of the quality of display even when imaging means is arranged on an anti-viewer side of display means.SOLUTION: The display device includes: a display panel 10 as display means for displaying predetermined information; imaging means 61 provided on the back side of the display panel 10; a visible light source 30 provided on the back side of the display panel 10; and a reflection member 40 for reflecting visible light discharged to a region away from an optical axis L of the visible light source 30 toward the display panel 10. The reflection member 40 has a through-hole 41c in a position of the imaging means 61.SELECTED DRAWING: Figure 2

Description

The present invention relates to a display device mounted on a vehicle such as an automobile or a motorcycle.

2. Description of the Related Art Conventionally, a display device of this type is known, for example, as described in Patent Document 1 below. The display device described in Patent Document 1 is a vehicle instrument mounted in front of the driver's seat of a vehicle, and includes a liquid crystal display panel (display means) that displays various vehicle information such as the running speed of the vehicle, It is mainly composed of a resin case member that accommodates the liquid crystal display panel.

Japanese Unexamined Patent Application Publication No. 2018-54291

In recent years, the face of a driver (viewer) who sits in the driver's seat of a vehicle and visually recognizes the liquid crystal display panel is imaged, and the state (behavior) of the driver is detected from the movement of the driver's face. Attention is being paid to the practical application of the technique of mounting the monitoring means on the vehicle instrument. By the way, in the display device described in Patent Document 1, it is not assumed that the driver monitoring means is mounted on the display device in order to detect the state of the driver. There was room for
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a display device capable of detecting the state of a viewer in order to solve the above-described problems.

In the present invention, a display means for displaying predetermined information and a state of a viewer viewing the display means can be imaged, and the display means is provided on the side opposite to the viewer side of the display means. an imaging means, a visible light source provided on the anti-viewer side of the display means, and a reflecting member for reflecting visible light emitted to a region away from the optical axis of the visible light source to the display means, The reflecting member is characterized in that a through portion or a missing portion is provided at a location corresponding to the imaging means.

Further, according to the present invention, a display means for displaying predetermined information and a state of a viewer viewing the display means can be imaged, and the display means is provided on the opposite side of the viewer side of the display means. a visible light source provided on the anti-viewer side of the display means; and a reflecting member that reflects visible light emitted to a region away from the optical axis of the visible light source to the display means, The imaging means is arranged on the anti-viewer side of the reflecting member having a function capable of transmitting infrared light.

Further, according to the present invention, the reflecting member includes a plurality of reflecting portions provided so as to surround the plurality of visible light sources, and the opening width of the reflecting portions gradually increases from the display means toward the visible light sources. It is characterized in that it is set so as to be narrow in width.

Further, the present invention is characterized by comprising an optical member provided between the display means and the reflecting member, wherein the optical member is provided with a hole or a missing portion at a location corresponding to the imaging means. and

Further, the present invention is characterized by comprising a case member that houses at least the visible light source and the reflecting member, and wherein the imaging means is arranged so as to correspond to a through hole provided in the case member.

Further, the present invention includes a case member that houses at least the visible light source and the reflecting member, and the imaging means is arranged on the anti-viewer side of the case member having a function of transmitting infrared light. characterized by

Further, the present invention is characterized by comprising a circuit board on which a plurality of the visible light sources are arranged, and the circuit board is provided with holes at locations corresponding to the imaging means.

Further, the present invention is characterized in that the plurality of visible light sources are arranged on the circuit board so as to form a matrix in a first direction and a second direction orthogonal to the first direction.

Further, according to the present invention, a plurality of visible light sources are arranged in the vicinity of the hole of the circuit board so as to be positioned on a predetermined imaginary circle centered on the center point of the hole. and

Further, according to the present invention, the plurality of visible light sources are arranged on the circuit board such that the arrangement interval in the vicinity of the hole is narrower than the arrangement interval in the portion other than the vicinity of the hole. do.

Further, the present invention is characterized in that a light control member having a function of transmitting infrared light and a function of diffusing visible light is positioned between the display means and the imaging means.

According to the present invention, it is possible to provide a display device that can achieve the intended purpose and that does not cause deterioration in display quality even when the imaging means is arranged on the side opposite to the viewer of the display means.

1 is a front view of a display device according to an embodiment of the invention; FIG. AA sectional view of FIG. Sectional drawing which expands and shows a circuit board, a light source, and a reflecting member in FIG. The front view of the principal part of the circuit board by the same embodiment. The figure which shows the positional relationship of the optical member and imaging means by the same embodiment. FIG. 2 is a block diagram showing the electrical configuration of the display device according to the same embodiment; Sectional drawing of the display apparatus by the 2nd modification of the same embodiment. Sectional drawing of the display apparatus by the 4th modification of the same embodiment. Sectional drawing of the display apparatus by the 5th modification of the same embodiment.

A case where the display device of the present invention is applied to a vehicle instrument installed in front of the driver's seat of an automobile will be described below with reference to FIGS. 1 to 6 as an example. In the following description, the side of the viewer looking straight at (visually recognizing) the vehicle instrument is referred to as the front side (front side), and the opposite side to the viewer side is referred to as the rear side (rear side). .

1 to 3, the vehicle instrument D as a display device according to the present embodiment includes a display panel (display means) 10 for displaying various vehicle information (predetermined information) such as vehicle speed information, and A circuit board 20 positioned on the rear side, a plurality of visible light sources 30 mounted on the front side of the circuit board 20 to supply visible light to the display panel 10, and a display panel 10 surrounding the visible light sources 30. Driving to monitor the reflective member 40 positioned between the circuit board 20, the protective member 50 covering the front side of the display panel 10, and the driver E (hereinafter also referred to as the viewer E) sitting in the driver's seat of the vehicle. Person monitoring means 60, optical member 70 provided between display panel 10 and reflecting member 40, and case member 80 housing display panel 10, circuit board 20, visible light source 30, reflecting member 40, optical member 70, etc. and

The display panel 10 can be a well-known liquid crystal display panel in which a front side polarizing plate and a rear side polarizing plate are respectively attached to the front and back surfaces of a liquid crystal cell in which liquid crystal is sealed between a pair of insulating substrates (glass substrates), for example. can.

The display panel 10 also has a flat display surface 11 that can be directly viewed by the viewer E, and the vehicle information is displayed on the display surface 11 . For example, FIG. 1 shows an example in which a vehicle speed display section 12 indicating the traveling speed of the vehicle is displayed as visual information in substantially the center of the display surface 11 (display panel 10) as an example of the vehicle information. Although detailed illustration is omitted here, the display panel 10 is electrically connected to the circuit board 20 using a wiring member such as a flexible printed wiring board.

The circuit board 20 is, for example, a rigid wiring board in which a wiring pattern is applied to a glass epoxy base material. and an infrared irradiation unit), a plurality of visible light sources 30, and various circuit components such as resistors and capacitors are conductively connected to the wiring pattern.

In addition, the circuit board 20 on which the plurality of visible light sources 30 are mounted (arranged) is provided with holes 21 at locations corresponding to the central portion of the display surface 11 (display panel 10) and the imaging means. there is The hole portion 21 is configured as, for example, a substantially circular through hole that is provided so as to penetrate the front and back of the circuit board 20 .

The visible light source 30 can be a plurality of chip-type light emitting diodes that emit visible light of appropriate colors, and is provided behind the display panel 10 so as to emit (supply) visible light toward the display panel 10. be done. The visible light source 30 used here has a directivity of about 60 degrees to the left and right with respect to the optical axis L. In other words, this means that the visible light source 30 has a light irradiation area angle of approximately 120 degrees.

In the case of this example, the plurality of visible light sources 30 are arranged in a first direction T1, which is the horizontal direction (longitudinal direction of the circuit board 20) in FIG. 4, and a second direction T2 (that is, 4) are mounted (arranged) on the front side of the circuit board 20 so as to form a matrix (lattice).

Furthermore, in the case of this example, a plurality of (four in FIG. 4) are arranged near the hole 21 of the circuit board 20 so as to be positioned on a predetermined imaginary circumference T3 centered on the center point C of the hole 21. ) is mounted on the circuit board 20 .

Specifically, in FIG. 4, focusing on the positional relationship between the hole 21 of the circuit board 20 and the four visible light sources 30 positioned near (around) the hole 21, these four visible light sources 30 are , in FIG. 4, are positioned at the top, bottom, left, and right of the hole 21 (12 o'clock, 3 o'clock, 6 o'clock, and 9 o'clock directions), and are arranged so that the distance from the hole 21 is equal. . Note that the four visible light sources 30 positioned on the virtual circle T3 are also referred to as visible light sources B in the following description.

The reflecting member 40 is configured as a reflector made of, for example, a white synthetic resin material, and reflects visible light emitted to a region distant from the optical axis L of the visible light source 30 to the optical member 70 (display panel 10 ).

The reflecting member 40 includes a plurality of reflecting portions 41 provided so as to surround each (a plurality of) visible light sources 30 . Each reflecting portion 41 is formed corresponding to each (plurality) of visible light sources 30, and includes four visible light beams in the shape of inclined surfaces that surround the internal space portion 42 located inside the reflecting portion 41 on all sides. It has a light reflecting surface 41 a and a bottom portion 41 b as a mounting portion to be mounted on the circuit board 20 .

The visible light reflecting surface 41a is configured as a portion that bends forward the optical path of the visible light emitted to a region away from the optical axis L of the visible light source 30 . Any shape can be adopted as the shape of the visible light reflecting surface 41a as long as the optical path of the visible light radiated to a region distant from the optical axis L can be bent forward. For example, the visible light reflecting surface 41a may be curved in a concave shape.

In addition, by providing the visible light reflecting surface 41a having an inclined surface shape (substantially inverted V shape when viewed in cross section) in this way, each reflecting portion 41 (internal space portion 42) has an opening width H is set to gradually narrow from the display panel 10 toward the circuit board 20 (visible light source 30).

Furthermore, in this case, a part of the reflecting portion 41 of the reflecting member 40 is provided with a through portion 41c that is a substantially circular through hole. The penetrating portion 41 c is provided at a portion of the reflecting portion 41 corresponding to the hole portion 21 of the circuit board 20 , the imaging means, etc., and can be obtained by hollowing out a portion of the reflecting member 40 .

The protective member 50 is a substantially flat plate-like protective panel member made of, for example, a semi-permeable (dark color) synthetic resin material, and is provided so as to cover the front side of the display panel 10 .

In addition, the protective member 50 has an outer shape that is one size (slightly) larger than the outer shape of the display panel 10, and is positioned outside the display panel 10 when the vehicular instrument D is viewed from the front side. It has a non-overlapped portion 51 that does not overlap with 10 . The protective member 50 may be made of a transparent synthetic resin material instead of a dark colored one, or may be joined to the display panel 10 with a translucent adhesive. Furthermore, the outermost surface of the protection member 50 on the front side may be a convex or concave curved surface shape (curved shape) instead of a flat flat surface.

The driver monitoring means 60 captures an image of the face of the viewer E seated in the driver's seat, and detects the state (behavior) of the viewer E from the movement of the viewer's E face. and an infrared irradiation unit 62 for irradiating the viewer E with infrared light (near-infrared light).

The imaging means 61 is a camera having sensitivity in the near-infrared region, and is arranged behind the display panel 10 . More specifically, the imaging means 61 here corresponds to the central portion and the hole portion 21 of the display panel 10, the through portion 41c, the through hole described later in the optical member 70, and the through hole portion described later in the case member 80. An imaging device 61a is arranged on the rear side of the case member 80, a lens 61b is arranged on the front side of the imaging device 61a, and a camera case (not shown) that accommodates the imaging device 61a and the lens 61b is provided. .

The camera case of the imaging means 61 is fixed to the bottom wall of the case member 80 by a suitable fixing means, which will be described later. Further, although detailed illustration is omitted here, the imaging means 61 may be configured to be covered (protected) by a meter housing that constitutes an exterior case of the vehicle meter D as needed.

The infrared irradiation section 62 is arranged behind the non-polymerized section 51 so as to irradiate the viewer E with infrared light. In this case, when the vehicle instrument D is viewed from the front side, the case member 80 (more specifically, the support portion of the case member 80, which will be described later) is positioned directly below the non-overlapping portion 51, and the infrared ray irradiation portion For 62, for example, two infrared light sources (infrared LEDs) arranged (embedded) in two recesses described later provided in the support can be applied.

As the optical member 70 , a plurality of (for example, four) optical components provided between the display panel 10 and the reflecting member 40 can be applied to guide visible light to the display panel 10 . In this example, the optical member 70 includes a prism lens array 71, a light diffusion sheet 72, a BEF (Brightness Enhancement Film) 73, and a DBEF (Dual Brightness Enhancement Film) 74. The prism lens array 71, the light diffusion sheet 72, the BEF 73, and the DBEF 74 are arranged in this order as one goes toward the other.

The prism lens array 71 is configured as a known optical component in which, for example, a large number of minute prism portions P having triangular cross-sections are formed on the reflecting member 40 side. The light diffusion sheet 72 plays a role of diffusing and uniforming the visible light emitted from the prism lens array 71 and refracted in a desired direction. As the light diffusing sheet 72, for example, an optical film or the like in which light diffusing particles are dispersed in a light transmissive resin film can be applied. BEF 73 is configured as a known brightness enhancement film, and DBEF 74 is configured as a known dual brightness enhancement film.

Focusing on the positional relationship between the optical member 70 (the prism lens array 71, the light diffusion sheet 72, the BEF 73, and the DBEF 74) and the imaging means 61, the prism lens array 71, the light diffusion sheet 72, the BEF 73, and the DBEF 74 include the imaging means. Through holes 71a, 72a, 73a, and 74a are provided at locations corresponding to 61 (see FIG. 5). These through holes 71 a , 72 a , 73 a , 74 a are obtained by hollowing out portions corresponding to the imaging means 61 .

The brightness of the visible light emitted from the light diffusion sheet 72 is improved by the BEF 73 and the DBEF 74 of the optical member 70 configured in this way, and the visible light with this brightness enhancement is the display panel 10 except for the central portion. guided to the point.

The case member 80 is a substantially box-shaped metal case (or resin case) that is open on the display panel 10 side. , side wall portions (support portions) 82 surrounding the sides (four sides) of the visible light source 30, the reflecting member 40, the optical member 70, and the like.

A through-hole-shaped through-hole penetrating through the front and back of the bottom wall portion 81 is provided in a substantially central portion of the bottom wall portion 81 corresponding to the hole portion 21, the through portion 41c, the imaging means 61, and the through-holes 71a, 72a, 73a, and 74a. A hole 81a is provided. Therefore, in this case, the hole portion 21, the through portion 41c, the imaging means 61, the through holes 71a, 72a, 73a, and 74a are arranged so as to correspond to the through hole portion 81a provided in the case member 80, respectively. .

On the other hand, in FIG. 2, two infrared radiation units 62 are arranged (embedded) in two depressions 82b provided in front wall portions 82a of a pair of side wall portions 82 located on the left and right sides. The infrared irradiation unit 62 is placed on a wiring board (not shown) provided at the bottom of the recess 82b. The wiring board and the circuit board 20 are electrically connected to each other by appropriately using a conducting means.

A vehicle instrument D is configured by the above components. In such a configuration, when each visible light source 30 is turned on, the visible light emitted from each visible light source 30 travels forward and reaches the prism lens array 71 . At this time, the visible light reaching the prism lens array 71 consists of a first visible light emitted along the optical axis L (and its vicinity) and a second visible light emitted toward a region away from the optical axis L. include.

The first visible light reaches the prism lens array 71 through the internal space 42 . On the other hand, the second visible light is reflected by the visible light reflecting surface 41a located around the visible light source 30 and travels forward. That is, the optical path X of the second reflected light is bent forward by the visible light reflecting surface 41a and reaches the prism lens array 71 (see FIG. 3). After that, the visible light including the first visible light and the second visible light travels to the light diffusion sheet 72 as visible light refracted in a desired direction, and is emitted from the light diffusion sheet 72 as uniform visible light. The BEF 73 and DBEF 74 improve the brightness of the visible light emitted from the light diffusion sheet 72, and the visible light with the improved brightness reaches 10 positions on the display panel excluding the central portion.

Further, by lighting four visible light sources B out of the plurality of visible light sources 30, the visible light emitted from the four visible light sources B is also configured to include the first visible light and the second visible light. be. Here, focusing on the second visible light from the visible light source B, the second visible light from the visible light source B is reflected by the visible light reflecting surface 41a positioned around the visible light source B as shown in FIG. The light travels forward, reaches the prism lens array 71, and then travels to the light diffusion sheet 72 as visible light refracted in a desired direction.

At this time, a part of the second visible light from the visible light source B reaching the prism lens array 71 leaks forward as leakage light refracted from the inner peripheral portion W1 of the prism lens array 71 facing the through hole 71a. And/or another part of the second visible light from the visible light source B reaching the light diffusion sheet 72 is diffused from the inner peripheral portion W2 of the light diffusion sheet 72 facing the through hole 72a and spreads forward as other leakage light. It leaks to the side. Leaked light and/or other leaked light travels forward through the through-holes 73a, 74a to the central portion of the display panel 10 corresponding to the through-holes 73a, 74a.

On the other hand, the infrared light irradiated from the infrared irradiation unit 62 passes through the non-polymerized portion 51 of the protective member 50 and is irradiated forward, and reaches the viewer E's face. Furthermore, the infrared light after irradiating the viewer E (the face of the viewer E) is reflected in the opposite direction (back side), and the protective member 50, the display panel 10, the through holes 74a, the through holes 73a, and the through holes 72a , the through hole 71a, the through portion 41c, and the hole portion 21, and then enter the imaging means 61 through the through hole portion 81a. As a result, the imaging means 61 can image the face of the viewer E illuminated by the infrared light, and acquires the reflected light reflected in the opposite direction as an image.

Next, based on FIG. 5, the electrical configuration of the vehicle instrument D will be described. The vehicle instrument D includes a control section M, a display panel 10 , a visible light source 30 , an imaging means 61 and an infrared irradiation section 62 .

The control unit M includes a work such as a ROM (Read Only Memory) storing an operation program of the control unit M, a CPU (Central Processing Unit) executing the operation processing of the control unit M by executing the operation program, and a CPU. It has a RAM (Random Access Memory) used as an area.

The control unit M determines the state of the viewer E based on the image captured by the imaging unit 61 . Specifically, based on the image captured by the imaging unit 61, the control unit M determines whether the viewer E is drowsy and whether the viewer E is inattentive driving. A process for judging the state of the viewer E such as whether or not is executed.

For example, when the control unit M determines that the viewer E is in a drowsy state, a warning sound ( A process for operating the speaker is executed so that a "beep" sound effect is sounded. It should be noted that a warning message for calling attention may be displayed on the display surface 11 under the control of the control section M instead of sounding the warning sound.

As described above, according to the present embodiment, the display panel 10 for displaying the predetermined information, the imaging means 61 provided behind the display panel 10, and the visible light source 30 provided behind the display panel 10 are provided. and a reflecting member 40 for reflecting visible light radiated to a region distant from the optical axis L of the visible light source 30 toward the display panel 10. The reflecting member 40 has a through portion at a location corresponding to the imaging means 61. 41c is provided.

Therefore, the infrared light after irradiating the viewer E (the face of the viewer E) is reflected toward the display panel 10 side (back side), and passes through the display panel 10, the through portion 41c, and the through hole portion 81a of the case member 80. By entering the imaging means 61 through the infrared light, the imaging means 61 can image the face of the viewer E illuminated by the infrared light, and a display device capable of detecting the state of the viewer E is provided. can provide.

Further, in this embodiment, the reflecting member 40 includes a plurality of reflecting portions 41 provided so as to surround the plurality of visible light sources 30 , and the opening width H of the reflecting portion 41 extends from the display panel 10 to the visible light sources 30 . It is set so that the width gradually narrows as it goes. Further, an optical member 70 (prism lens array 71, light diffusion sheet 72) provided between the display panel 10 and the reflection member 40 is provided, and the optical member 70 (prism lens array 71, light diffusion sheet 72) includes an imaging means. Through holes 71 a and 72 a are provided at locations corresponding to 61 .

Therefore, the display panel 10 in a state where the predetermined information is displayed from the viewer E side due to the supply of the leaked light and/or the other leaked light to the central portion of the display panel 10 When viewed, the brightness (display brightness) of the central portion of the display panel 10 increases, and the brightness difference between the central portion and other portions of the display panel 10 other than the central portion is reduced, and the display quality It is possible to provide a display device that does not cause a decrease in the .

Specifically, in FIG. 1, the brightness of the number "0" displayed in the central portion of the display panel 10 (display surface 11), the number "5" displayed in the other portion, and the vehicle speed unit A difference in brightness from the display brightness is less likely to occur (reduced), and the display on the vehicle speed display section 12 becomes a comfortable display mode. Therefore, when the display panel 10 is viewed from the viewer E side, the sense of presence of the imaging means 61 disappears further, and a display device with improved display quality can be provided.

Further, in the case of the present embodiment, in the vicinity of the hole 21 of the circuit board 20, a plurality of (for example, four) visible light sources are arranged so as to be positioned on an imaginary circle T3 centering on the center point C of the hole 21. By arranging B, it is possible to arrange the hole 21 (imaging means 61) corresponding to the non-mounting area of the visible light source 30, thereby suppressing the decrease in brightness in the central portion of the display panel 10. can do.

In addition, this invention is not limited by the above-mentioned embodiment and drawing. Changes (including deletion of constituent elements) can be made to the embodiments and drawings as appropriate without changing the gist of the present invention.

For example, in the above-described embodiment, the imaging means 61 is arranged behind the bottom wall portion 81 (case member 80) so as to correspond to the through hole portion 81a of the bottom wall portion 81 (case member 80). However, as a first modified example of the present embodiment, the imaging means 61 may be arranged so as to correspond to the through hole portion 81a. Specifically, for example, the imaging means 61 may be arranged in the through portion 41c or the through hole portion 81a. You may arrange|position so that it may straddle the through-hole part 81a.

Further, in the above-described embodiment, the bottom wall portion 81 (case member 80) is provided with the through hole portion 81a. 81a may be eliminated, and the case member 80 may be composed of a resin case having a function of transmitting infrared light. In other words, in this case, the imaging means 61 is arranged behind a case member 80 having a function of transmitting infrared light. The area (for example, the bottom wall portion 81) is a portion where no through hole or the like is formed.

Further, in the above-described embodiment, the reflecting member 40 is provided with the penetrating portion 41c. The reflecting member 40 may be composed of a resin member (white resin member) having a function of transmitting infrared light. That is, in this case, the imaging means 61 is arranged behind the reflecting member 40 having a function of transmitting infrared light. The area is a portion where no through holes or the like are provided. Needless to say, when adopting this third modification, the configuration of the above-described second modification can be adopted.

In addition, in the above-described embodiment, the plurality of visible light sources 30 are arranged in a matrix. A configuration in which they are not arranged may be adopted. For example, as shown in FIG. 8, the plurality of visible light sources 30 are arranged on the circuit board 20 such that the arrangement interval R1 in the vicinity of the hole 21 is narrower than the arrangement interval R2 in the portion other than the vicinity of the hole 21. It may be configured to be By configuring in this way, the visible light source B is densely mounted in the vicinity of the hole 21 as compared with the above-described embodiment, so that the luminance difference can be further reduced.

Further, in the above-described embodiment, the prism lens array 71, the light diffusion sheet 72, the BEF 73, and the DBEF 74 are arranged between the display panel 10 and the reflecting member 40. As a modification, as shown in FIG. 9, the prism lens array 71, the light diffusion sheet 72, the BEF 73, and the DBEF 74 are eliminated, and the imaging means 61 (reflecting member 40 ) and the display panel 10, the light control member 90 may be positioned. Note that the case member 80 in this fifth modified example is configured as a part that accommodates the display panel 10, the circuit board 20, the reflecting member 40, the light control member 90, and the like.

The light control member 90 is, for example, a plate-like member having a function of transmitting infrared light and a function of diffusing visible light reaching the display panel 10. a material 91, an infrared light transmitting portion 92 provided on the front side of the translucent base material 91 so as to transmit infrared light, and a rear side of the translucent base material 91 so as to diffuse visible light. and a light diffusion part 93 .

A transparent acrylic plate, for example, can be applied to the translucent base material 91 . The infrared light transmission part 92 can apply, for example, a white colored layer having a function of transmitting infrared light. It is applied (formed) to the entire surface. The white ink here preferably has a clarity (transparency) of 70% or more in the near-infrared wavelength region (for example, 850 nm to 940 nm). Further, the white ink here has a clarity (transparency) of less than 70% in the visible light wavelength region (eg, 360 nm to 830 nm), and more preferably, clarity (transparency) at 550 nm, for example. ) is 60% or less.

The light diffusing part 93 can apply, for example, a light diffusing layer having a function capable of diffusing visible light. It is provided on the rear side of the translucent substrate 91 using light diffusing ink. That is, the corresponding region 93a here is configured as a light diffusion layer non-formation region in which no light diffusion layer is formed.

According to this fifth modification, the light control member 90 having a function of transmitting infrared light and a function of diffusing visible light reaching the display panel 10 is positioned between the display panel 10 and the imaging means 61. It is configured. Therefore, the infrared light after irradiating the viewer E (the face of the viewer E) is reflected toward the display panel 10 side (back side), and 91, the corresponding region 93a, the through portion 41c, and the like, and enter the image capturing means 61, so that the image capturing means 61 can capture an image of the face of the viewer E illuminated by the infrared light. It is possible to obtain the same effects as those of the embodiment described above. In the fifth modified example, the light control member 90 includes the infrared light transmission portion 92 and the light diffusion portion 93. 93 may be included.

Further, in the above-described embodiment, the imaging means 61 is provided at a position corresponding to the central portion of the display panel 10. However, for example, the imaging means 61 is provided at a position corresponding to the upper center of the display panel 10 in FIG. If provided, the circuit board 20 is provided with a first notch portion corresponding to the imaging means 61 (above center), and the reflecting member 40 is provided with a first notch portion corresponding to the imaging means 61 (above center). A second notch portion is provided as a missing portion at the corresponding location, and the optical member 70 (prism lens array 71, light diffusion sheet 72, BEF 73, DBEF 74) is missing at a location corresponding to the imaging means 61 (above center). A partial third cutout must be provided. These first to third notches are obtained by notching a portion of the end corresponding to the upper center of the circuit board 20, the reflecting member 40, and the optical member 70 in a substantially U-shape. .

In addition, in the above-described embodiment, the two infrared ray irradiators 62 are arranged in the recessed portion 82b of the case member 80, respectively, but the number of the infrared ray irradiators 62 may be one or three or more. In that case, the case member 80 may be provided with the same number of depressions 82b as the number of the infrared irradiation units 62 . In addition, the infrared irradiation unit 62 can be provided at any position as long as it can irradiate the infrared light toward the viewer E. For example, the infrared irradiation unit 62 can be arranged at a predetermined position on the instrument panel of the vehicle. may Further, although the prism lens array 71 is provided with the through holes 71a, the prism lens array 71 without the through holes 71a may be employed. It is not necessary to provide the prism part P at the position.

10 display panel (display means)
20 Circuit board 21 Hole 30 Visible light source 40 Reflecting member 41 Reflecting part 41a Visible light reflecting surface 41b Bottom 41c Penetrating part 42 Internal space 50 Protective member 60 Driver monitoring means 61 Imaging means 62 Infrared irradiation part 70 Optical member 71 Prism lens Array 71a, 72a, 73a, 74a Hole 72 Diffusion Sheet 73 BEF
74 DBEF
80 Case member 81 Bottom wall (base)
81a through-hole portion 82 side wall portion (support portion)
82b recess 90 light control member C center point of hole E viewer (driver)
H Opening width T1 First direction T2 Second direction T3 Virtual circumference

Claims (11)

display means for displaying predetermined information;
an imaging means capable of imaging the state of a viewer viewing the display means, and provided on the side opposite to the viewer side of the display means, which is opposite to the viewer side;
a visible light source provided on the anti-viewer side of the display means;
a reflecting member that reflects visible light emitted to a region away from the optical axis of the visible light source to the display means;
A display device, wherein the reflecting member is provided with a through portion or a missing portion at a location corresponding to the imaging means. display means for displaying predetermined information;
an imaging means capable of imaging the state of a viewer viewing the display means, and provided on the side opposite to the viewer side of the display means, which is opposite to the viewer side;
a visible light source provided on the anti-viewer side of the display means;
a reflecting member that reflects visible light emitted to a region away from the optical axis of the visible light source to the display means;
A display device according to claim 1, wherein the imaging means is arranged on the anti-viewer side of the reflecting member having a function capable of transmitting infrared light. The reflective member includes a plurality of reflective parts provided to surround each of the plurality of visible light sources,
3. The display device according to claim 1, wherein the opening width of the reflecting portion is set so as to gradually narrow from the display means toward the visible light source. An optical member provided between the display means and the reflecting member,
4. The display device according to any one of claims 1 to 3, wherein the optical member is provided with a through hole or a missing portion at a location corresponding to the imaging means. A case member that houses at least the visible light source and the reflective member,
5. The display device according to any one of claims 1 to 4, wherein the imaging means is arranged so as to correspond to a through hole provided in the case member. A case member that houses at least the visible light source and the reflective member,
5. The display device according to any one of claims 1 to 4, wherein the imaging means is arranged on a side opposite to the viewer of the case member having a function of transmitting infrared light. . A circuit board on which the plurality of visible light sources are arranged,
7. The display device according to claim 1, wherein the circuit board is provided with a hole at a location corresponding to the imaging means. 8. The display device according to claim 7, wherein the plurality of visible light sources are arranged on the circuit board so as to form a matrix in a first direction and a second direction perpendicular to the first direction. 8. A plurality of said visible light sources are arranged in the vicinity of said hole of said circuit board so as to be positioned on a predetermined imaginary circle centered on the central point of said hole. Or the display device according to claim 8 . 8. The plurality of visible light sources are arranged on the circuit board such that an arrangement interval in the vicinity of the hole is narrower than an arrangement interval in other portions other than the vicinity of the hole. display device. 10. A structure in which a light control member having a function of transmitting infrared light and a function of diffusing said visible light is positioned between said display means and said imaging means. The display device according to any one of

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