JP7415249B2 - display device - Google Patents

Description

The present invention relates to a display device including a display unit that displays images.

As a conventional display device, there is one disclosed in Patent Document 1, for example. In order to enlarge the display screen, such a display device has a plurality of transparent parts on one protective plate, and a liquid crystal display unit is placed behind each transparent part, so that the display area of the liquid crystal display unit can be enlarged. Visible from the transparent part.

JP2015-099285A

However, the display device described in Patent Document 1 has a problem in that the image is only displayed on the see-through portion of the protection plate, and the display lacks interest.

Therefore, it is an object of the present invention to provide a display device that can display an interesting display on a protection plate.

In order to achieve the above object, it has a transparent protection member 4 and a first display surface 11 that displays a first image 11a, and the first display surface 11 is arranged to face the protection member 4. a first display device 1 disposed behind the protective member 4; a second display device 2 having a second display surface 21 that displays a second image 21a; and a third display device 2 that displays a third image. a third display having a third display surface and arranged behind the protection member such that the third display surface faces the protection member; an imaging optical element 5 that is disposed between the display device 2 and the display device 2 and that images the second image 21a as a spatial image 51a on a spatial image plane 51 that is a plane-symmetrical position of the second display surface 21. , the spatial image 51a is formed in front of the protection member 4 and between the first image and the third image when the protection member 4 is visually recognized.

FIG. 1 is a front view of a display device according to a first embodiment of the present disclosure. FIG. 2 is a cross-sectional view taken along line AA in FIG. 1. FIG. 2 is a cross-sectional view of a display device according to a second embodiment of the present disclosure. FIG. 3 is a cross-sectional view of a display device according to a third embodiment of the present disclosure.

A display device 100 according to an embodiment of the present disclosure will be described with reference to FIGS. 1 to 4. The display device 100 is configured as an instrument device that is mounted on a vehicle such as an automobile and displays a predetermined measured quantity such as vehicle speed. The present disclosure is not limited to these embodiments, and can be applied, for example, to instrumentation devices for vehicles mounted on movable bodies including motorcycles, agricultural machinery, and construction machinery.

Note that, in order to facilitate understanding of the configuration of the display device 100, each member will be described below from the direction in which the driver seated in the driver's seat of the vehicle is viewed from the display device 100 (the front direction in FIG. 1 and the direction in FIG. 2). The protective member 4 side) is referred to as the "front", and the opposite side (the rear direction in FIG. 1 and the circuit board 6 side in FIG. 2) is referred to as the "rear".

(First embodiment)
As shown in FIGS. 1 and 2, the display device 100 includes a first display 1, a second display 2, a third display 3, a protection member 4, an imaging optical element 5, A circuit board 6 is provided.

The first, second, and third displays 1, 2, and 3 include, for example, a liquid crystal panel (not shown below), a light source means comprising a light source for illuminating the liquid crystal panel, a reflective sheet, a light guide plate, and various optical sheets, and a liquid crystal panel. This is a well-known liquid crystal display unit consisting of a frame body made of resin or metal and housing a light source means.

A liquid crystal panel consists of a pair of front and rear glass substrates on which transparent electrodes such as ITO (Indium Tin Oxide) are formed, and a liquid crystal material sealed inside the glass substrates.A polarizing plate (polarizing filter) is attached to the outside of both glass substrates. This is a well-known normally black type liquid crystal panel (displays black when no voltage is applied) using a TFT (Thin Film Transistor) system formed using the same technology.

The first, second, and third display devices 1, 2, and 3 have first, second, and third display surfaces 11, 21, and 31 that display first, second, and third images 11a, 21a, and 31a, respectively. The first, second, and third display surfaces 11, 21, and 31 are formed on a liquid crystal panel. The first and third display devices 1 and 3 are arranged behind the protection member 4 so that the first and third display surfaces 11 and 31 face the protection member 4, respectively.

In the first display device 1, the first display surface 11 is arranged in front of the third display surface 31 in the front-rear direction (normal direction) of the first display surface 11. The third display device 3 is arranged on both left and right sides of the first display device 1. The third display 3 is arranged one step further back than the first display 1. The second display 2 is arranged behind the first display 1. The second indicators 2 are arranged closer to the third indicators 3, respectively. The second display 2 is arranged such that the second display surface 21 is arranged at an angle D1 of about 90 degrees with respect to the first display surface 11, and the second display surface 21 faces the third display 3. Placed.

The protective member 4 is disposed on the front surface of a case body 9 made of resin that houses the first, second, and third displays 1, 2, and 3, the imaging optical element 5, and the circuit board 6. The protective member 4 includes a base material 41, a light shielding layer 42, and a colored layer 43. The base material 41 is made of, for example, a transparent thin plate-shaped synthetic resin (eg, polycarbonate or acrylic).

The light-shielding layer 42 is formed by printing black light-shielding ink on substantially the entire back surface of the base material 41 . The light shielding layer 42 has a first window section 42a, a second window section 42b, and a third window section 42c. The first and second windows 42a and 42b are rectangular windows in which no light-shielding ink is printed (formed) at positions facing the first and third display surfaces 11 and 31, respectively. The third window 42c is a rectangular window on which no light-shielding ink is printed at a position corresponding to the imaging optical element 5. The third window 42c is formed between the first window 42a and the second window 42b.

The colored layer 43 is formed by printing smoke ink colored in smoke color (semi-transparent black) on the back surface of the base material 41. The colored layer 43 is printed so as to fill the first, second, and third window portions 42a, 42b, and 42c of the light shielding layer 42.

The protective member 4 is formed into a flat plate shape at portions corresponding to the first window portion 42a and the second window portion 42b. The protection member 4 has a bent portion 44 . The bent portion 44 is formed in a crank shape so as to connect the first display surface 11 and the third display surface 31 which are arranged in front and behind in the normal direction of the first display surface 11 . The bent portion 44 has an inclined portion 44a whose cross section is a straight line. The bent portion 44 is formed between the first window portion 42a and the second window portion 42b. The third window portion 42c is formed in the bent portion 44 including the inclined portion 44a.

The circuit board 6 is arranged behind the third display 3, as shown in FIG. The circuit board 6 is equipped with a control section (not shown) for controlling the first, second, and third displays 1, 2, and 3. The control unit includes a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), a graphic controller, a power supply circuit that controls the power supply of the display device 100, etc. A predetermined calculation process is executed according to the programmed program.

The control unit acquires vehicle speed, engine rotation speed, various vehicle information, navigation information, etc. from an ECU (Electronic Control Unit) of the vehicle via various sensors and the like. The control unit causes the first, second, and third displays 1, 2, and 3 to display information based on the acquired information.

The first, second, and third displays 1, 2, and 3 are connected to a circuit board 6 via an FPC (Flexible Printed Circuit) (not shown). The first, second, and third displays 1, 2, and 3 are controlled by a control unit such as a graphic controller on the circuit board 6, so that a driving voltage is applied to the liquid crystal layer through the transparent electrode, and various images are displayed. indicate.

The control unit displays images related to vehicle speed, engine speed, various vehicle information, navigation information, etc. on the first image 11a and the third image 31a. The control unit displays an image related to the first image 11a and the third image 31a on the second image 21a. For example, as shown in FIG. 1, when a wave pattern image is displayed in the first image 11a and the third image 31a, the second image 21a is different from the first image 11a and the third image 31a. Displays an image of a wave pattern that connects the .

The imaging optical element 5 is called a micromirror array that includes a large number of micromirrors (corner reflectors) (not shown) formed in a rectangular flat plate shape. The imaging optical element 5 reflects the display light that is the second image 21a from the second display 2, and reflects the light toward a plane-symmetrical position on the second display surface 21 with the imaging optical element 5 as the center. let The reflected display light (second image 21a) gathers to form a spatial image plane 51, and is imaged on this spatial image plane 51 as a spatial image 51a. The spatial image plane 51 is a virtual area in which a spatial image 51a can be displayed in the air. It is located in front of the protection member 4.

The imaging optical element 5 is arranged behind the protection member 4 and between the protection member 4 and the second display 2 . The imaging optical element 5 is arranged to face the bent portion 44 of the protection member 4 and is arranged at an angle of about 45 degrees with respect to the second display surface 21 of the second display 2. The imaging optical element 5 is arranged at a position where the spatial image plane 51 is substantially parallel to and substantially on the same plane as the first display surface 11 . The spatial image plane 51 is located in front of the protection member 4.

The aerial image 51a is visually recognized in front of the protective member 4 when the protective member 4 is visually recognized. The spatial image 51a is visually recognized at a position next to the first image 11a and the third image 31a, as well as at a position between them when the protection member 4 is visually recognized. The aerial image 51a is visually recognized at a position facing the bent portion 44 when the protection member 4 is visually recognized. The aerial image 51a is visually recognized at a position substantially parallel to and substantially on the same plane as the first display surface 11 when the protection member 4 is visually recognized.

The first and second windows 42a and 42b of the protection member 4 serve as display areas where the first and third images 11a and 31a are viewed when the protection member 4 is viewed. Further, the third window portion 42c of the protection member 4 becomes an area where the second image 21a is visually recognized as an aerial image when the protection member 4 is visually recognized. The other part of the protection member 4 becomes a non-display area where nothing is displayed.

By forming in this way, it is possible to provide the display device 100 that can display an interesting display such as displaying an aerial image in front of the first and third displays 1 and 3 and the protection member 4. Further, it is possible to provide the display device 100 which can display an aerial image at a position substantially parallel to the first display surface 11 and which is capable of more interesting display.

(Second embodiment)
A second embodiment of a display device 100 according to the present disclosure will be described based on FIG. 3. The same parts and equivalent parts as in the first embodiment described above will be described with the same reference numerals.

In the first embodiment, the imaging optical element 5 was arranged at an angle of about 45 degrees with respect to the second display surface 21 of the second display 2, but in the present embodiment, the imaging optical element 5 is arranged at an angle D2 of about 20 degrees with respect to the second display surface 21 of the second display 2. The imaging optical element 5 is arranged at a position substantially parallel to the inclined portion 44a of the bent portion 44. The spatial image plane 51 is formed at a position along the surface of the bent portion 44, and the spatial image 51a can be visually recognized at a position substantially parallel to the surface of the bent portion 44 when the protection member 4 is visually recognized.

By being formed in this way, an aerial image can be displayed at a position close to the first display surface 11 and the third display surface 31 in front of the first and third displays 1 and 3 and the protection member 4, respectively. It is possible to provide a display device 100 that is capable of more interesting display.

(Third embodiment)
A third embodiment of a display device 100 according to the present disclosure will be described based on FIG. 4. The same parts and equivalent parts as in the first embodiment described above will be described with the same reference numerals.

In this embodiment, the second display 2 of the first embodiment includes a light source 7 and a light guide member 8.

The light source 7 is comprised of a top-view type (a type that emits light in the normal direction of the circuit board 6) LED (Light Emitting Diode: chip type light emitting diode) that emits an appropriate color (for example, white). A plurality of light sources 7 are mounted on the front surface of the circuit board 6 at positions facing the light guide member 8 .

The light guide member 8 is made of, for example, a translucent rectangular parallelepiped synthetic resin (eg, polycarbonate or acrylic). The light guide member 8 has a light receiving surface 81, a reflecting surface 82, and a display surface 83. The light receiving surface 81 receives light from the light source 7. The reflective surface 82 reflects the light that has entered the light guide member 8 from the light receiving surface 81 toward the display surface 83 . The display surface 83 has a design 82a formed by uneven grooves, texturing, etc., and emits light by diffusing the light from the reflective surface 82 here.

The design 82a displays a design related to the first image 11a and the third image 31a. For example, similarly to the first embodiment (see FIG. 1), when wave pattern images are displayed in the first image 11a and the third image 31a, the design 82a is different from the first image 11a and the third image 31a. A wave pattern design connecting the images 31a and 3 is displayed.

The display surface 83 is formed at the same position as the second display surface 21 of the first embodiment. The imaging optical element 5 images the display light, which is the design 82a on the display surface 83, onto the spatial image plane 51 similar to the first embodiment.

By being formed in this way, the display device 100 is capable of displaying an interesting display such as displaying an aerial image with a simpler configuration in front of the first and third displays 1 and 3 and the protection member 4. can be provided.

Note that the present disclosure is not limited to the embodiment described above, and various modifications can be made within the scope of the gist of the present disclosure.

For example, the position of the spatial image plane 51 is determined by the position of the second display 2, the position of the imaging optical element 5, and the angle between the second display plane 21 and the imaging optical element 5. These positions are not limited to the embodiments of the present disclosure, and may be designed in any manner.

Further, although the portions of the protection member 4 facing the first window portion 42a and the second window portion 42b are formed in a flat plate shape, they may be curved in an uneven shape. Further, the imaging optical element 5 may be attached to the protection member 4 with double-sided adhesive tape or the like. Further, the space between the first and third indicators 1 and 3 may be filled by bonding the protective member 4 and a transparent optical adhesive (OCA) sheet.

Further, the first, second, and third displays 1, 2, and 3 may be of a multi-dot type or a segment type, and may be monochrome display, full color display, or positive/negative display. Furthermore, the first, second, and third indicators 1, 2, and 3 may be EL (Electro Luminescence) modules. Further, the electrical connection between the first, second, and third display devices 1, 2, and 3 and the circuit board 6 may be made not only by FPC but also by a current-carrying member made of lead wires, conductive rubber, or the like. Although an LED is used as the light source 7 which is the illumination means, other illumination means may be used.

100 Display device 1 First display 11 First display surface 11a First image 2 Second display 31 Third display surface 21a Second image 2 Second display 21 Second display surface 21a Second image 4 Protective member 41 Base material 42 Light shielding layer 42a First window section 42b Second window section 42c Third window section 43 Colored layer 44 Bent section 44a Slanted section 5 Imaging optical element 51 Spatial image plane 51a Aerial image 6 Circuit board 7 Light source 8 Light guiding member 81 Light receiving surface 82 Reflecting surface 83 Display surface 9 Case body D1 Angle D2 Angle

Claims (6)

A transparent protective member,
a first display having a first display surface that displays a first image and disposed behind the protection member such that the first display surface faces the protection member;
a second display having a second display surface that displays a second image;
a third display having a third display surface that displays a third image, and disposed behind the protection member such that the third display surface faces the protection member;
an imaging optical element that is disposed between the protection member and the second display and forms the second image as a spatial image on a spatial image plane that is a plane-symmetrical position of the second display surface; ,
Equipped with
The display device is characterized in that the spatial image is formed in front of the protection member and between the first image and the third image when the protection member is visually recognized. The display device according to claim 1, wherein the second display is arranged behind the first display . The protection member has a bent part bent in the front-back direction,
The display device according to claim 1, wherein the bent portion is formed in a crank shape so as to connect the first display surface and the third display surface . 4. The display device according to claim 3, wherein the spatial image plane is formed along a surface of the bent portion. The display device according to claim 1, wherein the spatial image plane is formed parallel to the first display surface. a circuit board;
a control unit mounted on the circuit board that displays information on the first, second, and third displays based on the acquired information;
6. The display device according to claim 1, wherein the control unit causes the second image to display an image related to the first image and the third image.

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