JP6041129B2 - Display device - Google Patents

Description

  The present invention relates to a display device that is mounted on a vehicle such as an automobile and displays various information such as a vehicle speed and an engine speed.

  Conventionally, as this type of display device, for example, the one described in Patent Document 1 below is known. The display device described in Patent Document 1 includes a vehicle instrument provided on an instrument panel of a vehicle, and includes a first display unit that digitally displays a vehicle speed, and a first display unit that is separated from the first display unit. 1 and a second display unit for displaying the engine speed, fuel gauge, water temperature gauge, etc. of the vehicle in an analog manner. A driver who sits in the driver's seat of the vehicle has both display units. The vehicle can be driven while viewing vehicle information such as the displayed vehicle speed and engine speed.

JP 2008-290590 A

However, in the case of the display device described in Patent Document 1, since the vehicle information such as the vehicle speed and the engine speed displayed on both display units is a real image display, the display of the vehicle information displayed as a real image is displayed. The form had to be simple and lacked novelty.
Therefore, the present invention aims to provide a display device capable of realizing a novel appearance by using two display units in order to cope with the above-described problems.

The present invention includes a real image display unit arranged with a real image display unit facing a viewer side, a virtual image display unit arranged with a virtual image display unit facing the viewer side, and A transmission / reflection member that transmits the first display light emitted from the real image display unit to the viewer side and reflects the second display light emitted from the virtual image display unit to the viewer side; A housing for housing the display unit and the virtual image display unit, and the transmission / reflection member is disposed in the housing so as to be interposed between the real image display unit and the virtual image display unit, A real image by the first display light emitted from the real image display unit and transmitted through the transmission / reflection member, and before being emitted from the virtual image display unit and reflected by the transmission reflection member Is visible in a state where the virtual image of the second display light is arranged, the transmission-reflection member, characterized in that the predetermined portions so that the virtual image is superimposed with the landscape is extended upward of said housing And

  ADVANTAGE OF THE INVENTION According to this invention, the initial objective can be achieved and the display apparatus which can implement | achieve a novel appearance using two display units can be provided.

1 is a cross-sectional view of a display device according to an embodiment of the present invention. The figure which shows the real image and virtual image when the transmission / reflection member is seen from the viewer side by the embodiment.

  Hereinafter, based on FIG. 1, FIG. 2, one Embodiment which applied this invention to the instrument for vehicles provided in the instrument panel of a vehicle is described.

  In FIG. 1, a vehicle instrument as a display device according to the present embodiment is provided on an instrument panel of a vehicle in front of a driver (viewer) D who sits in a driver's seat such as an automobile, for example. A real image display unit 10 arranged with a real image display unit, which will be described later, facing a virtual image display unit 20 arranged with a virtual image display unit, which will be described later, facing the driver D side, and a real image display unit. It is mainly composed of a half mirror (transmission / reflection member) 30 positioned (intervened) between the display unit 10 and the virtual image display unit 20, and a housing 40 that accommodates the real image display unit 10 and the virtual image display unit 20. Has been.

  The real image display unit 10 includes a first display element 11 that is a real image display unit, a source line drive circuit (not shown) that drives a source line (signal line) of the first display element 11, a display A gate line driving circuit (not shown) for driving the gate line (scanning line) of the element 11, a light guide 12 a, a light source 12 b, a flexible wiring board 12 c, and the like, and illuminating light to the first display element 11. A real image display unit comprising a lighting means 12 for guiding, a resin case 13 made of a substantially flat white resin holding the first display element 11 and the light guide 12a, a front frame 14 and a back frame 15. A frame body 16 made of a conductive material constituting 10 exterior cases, and a timing controller for generating various timing signals for controlling timings of the source line driving circuit and the gate line driving circuit. And a printed circuit board over La, etc. is mounted (not shown), it is fixed to the housing 40 using an appropriate securing means.

  In this case, the frame body 16 including the front frame 14 and the back frame 15 accommodates the first display element 11, the light guide body 12 a, the light source 12 b, the resin case 13, and the like. If necessary, an optical member (for example, a diffusion sheet or a prism sheet) for backlight illumination of the first display element 11 substantially uniformly is provided between the first display element 11 and the light guide 12a. Two or more may be arranged.

  The first display element 11 includes, for example, a TFT (thin film transistor) type liquid crystal display panel in which a polarizing film is provided on the front and back surfaces of a liquid crystal cell in which liquid crystal is sealed in a pair of translucent substrates, and the vehicle speed mounted on the vehicle. Based on detection signals from various sensors other than the sensors, the display unit includes a real image display unit that displays vehicle information (predetermined information) such as a fuel gauge, fuel consumption, and outside air temperature. The real image display unit is displayed in a display area (not shown) of the first display element 11.

  In addition to the vehicle information, the display information (the predetermined information) displayed on the first display element 11 that is a real image display unit is, for example, navigation information or back monitor information displayed when the vehicle is moving backward. Also good. If necessary, a low reflection process may be performed on the surface of the display area in order to prevent external light reflection on the surface of the display area.

  The light guide 12 a is made of a substantially flat light-transmitting synthetic resin and is disposed along the back surface of the first display element 11. In other words, the light guide 12a is arranged in the illumination optical path from the light source 12b to the first display element 11.

  The light sources 12b are formed of chip-type light emitting diodes that emit colors as appropriate. A plurality of light sources 12b are arranged in a line along one side surface 12d located on the upper side of the light guide 12a, and supply illumination light to the first display element 11. It consists of a luminous body. And the illumination light from the light source 12b permeate | transmits the 1st display element 11, and the 1st display light L1 which is the display light which shows the said predetermined information from the 1st display element 11 toward the half mirror 30 Emitted.

  The front frame 14 is formed in a substantially frame shape, and a display window portion 14 a formed of a substantially rectangular opening window is formed at the center of the front frame 14 so as to correspond to the display element 11. The rear frame 15 that forms a pair with the front frame 14 is formed in a substantially concave shape in cross section, and is provided so as to cover the rear side of the resin case 13.

  In FIG. 1, the flexible wiring board 12c is fixed to the inner wall surface of the wall portion 15a located above the back frame 15 by using an appropriate fixing means, and each light source 12b has one side surface 12d of the light guide 12a. It is mounted on a conductive path (not shown) provided in the flexible wiring board 12c so as to face.

  The virtual image display unit 20 is arranged at a position closer to the driver D side than the arrangement position of the real image display unit 10, and includes a circuit board 21, a light emitter 22 mounted on the circuit board 21, and the light emitter. A second display element 23, which is a virtual image display unit positioned on the front side of the light emitter 22, so as to transmit the illumination light from the light 22 and form the second display light L2, the circuit board 21, and the light emitter 22. A case body 24 that accommodates the second display element 23 is provided, and is fixed to the housing 40 using an appropriate fixing means.

  The circuit board 21 is made of, for example, a wiring board provided with a predetermined wiring pattern, and a light emitter 22 is mounted on the wiring pattern.

  The light emitter 22 is a light emitter that is composed of a chip-type light emitting diode that appropriately emits color and supplies illumination light to the second display element 23.

  The second display element 23 is composed of a TFT liquid crystal display panel in the same manner as the first display element 11 provided in the real image display unit 10. The second display element 23 includes a virtual image display unit that displays a vehicle speed based on a vehicle speed detection signal from a vehicle speed sensor mounted on the vehicle. The virtual image display unit is displayed in a display area (not shown) of the second display element 23.

  If necessary, the display area surface may be subjected to a low reflection treatment in order to prevent reflection of external light on the display area surface, or between the light emitter 22 and the second display element 23. Alternatively, a lens member having a flat surface on the light emitter 22 side and a convex surface on the second display element 23 side may be disposed.

  The case body 24 is made of a synthetic resin, is formed in a substantially box shape, and includes an opening 24 a for facing a display area (not shown) of the second display element 23. And the 2nd display light L2 which is the vehicle speed display light emitted from the 2nd display element 23 becomes a structure which passes the opening part 24a and is guide | induced to the half mirror 30 side.

  The half mirror 30 is made of, for example, dark colored glass or a synthetic resin material, and the surface facing the driver D side is a concave surface having a predetermined curvature. In some cases, a reflective film made of a light interference film may be attached to the surface of the half mirror 30 (the surface facing the driver D).

  The half mirror 30 is fixed (arranged) to the housing 40 with an appropriate fixing means so as to be positioned (intervened) between the real image display unit 10 and the virtual image display unit 20. The emitted first display light L1 is transmitted to the driver D side and the second display light L2 emitted from the virtual image display unit 20 is reflected to the driver D side.

  Further, in this case, the half mirror 30 is fixed to the housing 40 so as to be substantially upright, and the required portion of the housing 40 is such that only the virtual image P2 of the real image P1 and the virtual image P2 is superimposed on the landscape. It extends upward (protrudes out). Here, the required portion refers to an upper half region (hereinafter referred to as an upper region R1) when the half mirror 30 is divided into two equal parts as shown in FIG.

  FIG. 2 shows a real image P <b> 1 and a virtual image P <b> 2 that the driver D visually recognizes when the driver D views the half mirror 30 from the front.

  Specifically, the virtual image P2 indicating the vehicle speed display image is displayed on the upper region R1 of the half mirror 30 so as to be superimposed on the landscape by the second display light L2 emitted from the virtual image display unit 20. On the other hand, in the lower half region of the half mirror 30 (hereinafter referred to as the lower region R2) that is a region other than the upper region R1, the virtual image P2 is defined by the first display light L1 emitted from the real image display unit 10. A real image P1 indicating a different display image (for example, a travel distance display image) is displayed. The real image P1 is visually recognized at a position closer to the virtual image P2.

  That is, in the case of this example, when viewing the half mirror 30 from the driver D side, the driver D emits the real image P1 by the first display light L1 emitted from the real image display unit 10 and transmitted through the half mirror 30, and a virtual image. The virtual image P2 by the second display light L2 emitted from the display unit 20 and reflected by the half mirror 30 is viewed in a state where the virtual image P2 is juxtaposed vertically, and the virtual image P2 is further away from the display position of the real image P1. It is configured to be viewed as if it is located.

  Therefore, in the conventional case, the vehicle information displayed on both display units is displayed as a real image. In the present embodiment, among the real image P1 and the virtual image P2 that the driver D visually recognizes through the half mirror 30, The real image P1, which is a different kind of display image, is displayed as a real image without being superimposed on the landscape, and a virtual image P2 (vehicle speed display image) adjacent to the real image P1 is superimposed on the landscape, and from the display position of the real image P1. Since the virtual image is displayed as if it is located far away, the vehicle information seen through the half mirror 30 becomes unusual (and interesting) and realizes a new appearance. Can do.

  The housing 40 is formed of, for example, a black synthetic resin material or aluminum die cast, and includes an upper case 41 and a lower case 42, and is an internal space formed by the upper case 41 and the lower case 42. In the space 43, the real image display unit 10 and the virtual image display unit 20 are accommodated.

  The upper case 41 is formed with an opening window 44 for allowing the second display light L2 emitted from the virtual image display unit 20 to pass therethrough. In FIG. 1, reference numeral 45 denotes a translucent cover made of a translucent synthetic resin material disposed so as to close the opening window 44 of the upper case 41, and is a second light emitted from the virtual image display unit 20. The display light L2 passes through the translucent cover 45 and is guided to the half mirror 30 (upper region R1).

  As described above, in the present embodiment, the real image display unit 10 arranged with the first display element (real image display unit) 11 facing the driver D side and the second side on the opposite side of the driver D side. The virtual image display unit 20 disposed with the display element (virtual image display unit) 23 facing the display element 20 and the first display light L1 emitted from the real image display unit 10 are transmitted to the driver D side and the virtual image display unit. 20 includes a half mirror 30 that reflects the second display light L <b> 2 emitted from 20 toward the driver D, and a housing 40 that houses the real image display unit 10 and the virtual image display unit 20. First display light L1 which is disposed in the housing 40 so as to be interposed between the display unit for image 10 and the display unit for virtual image 20 and is emitted from the display unit for real image 10 and transmitted through the half mirror 30. A real image P1 by one in which a virtual image P2 by the second display light L2 reflected by the half mirror 30 is emitted from the virtual image display unit 20 is viewed in a state of being parallel. Further, the half mirror 30 has its required portion extending above the housing 40 so that the virtual image P2 is superimposed on the landscape.

  Therefore, among the real image P1 and the virtual image P2 that the driver D visually recognizes through the half mirror 30, the real image P1, which is the dissimilar display image, is displayed as a real image without being superimposed on the landscape, and is adjacent to the real image P1. Since the virtual image P2 (vehicle speed display image) is superimposed on the landscape and displayed as a virtual image as if it is located farther away from the display position of the real image P1, the vehicle information viewed through the half mirror 30 is It will be something unusual and interesting, and a new look can be realized.

  In the present embodiment, an example in which a TFT-type liquid crystal display panel (that is, the first display element 11) is used as the real image display unit 10 has been described. A real image display unit including an engine tachometer, a fuel gauge, a water temperature gauge, and the like may be employed.

  In the present embodiment, a virtual image P2 that is a vehicle speed display image is displayed by the second display light L2 emitted from the virtual image display unit 20, and the virtual image P2 is displayed by the first display light L1 emitted from the real image display unit 10. Although the example in which the real image P1, which is the different kind of display image, is displayed, has been described, the display image displayed by the real image P1 and the virtual image P2 can be any display image as long as it is a different type of display image. It goes without saying that it can be adopted.

DESCRIPTION OF SYMBOLS 10 Real image display unit 11 1st display element 12 Illumination means 13 Resin frame 16 Frame body 20 Virtual image display unit 21 Circuit board 22 Light-emitting body 23 2nd display element 30 Half mirror (transmission reflection member)
40 Housing 45 Translucent cover D Driver (viewer)
L1 First display light L2 Second display light P1 Real image P2 Virtual image

Claims (1)

A real image display unit arranged with the real image display unit facing the viewer side;
A display unit for virtual images arranged with the display unit for virtual images facing away from the viewer side;
A transmission / reflection member that transmits the first display light emitted from the real image display unit to the viewer side and reflects the second display light emitted from the virtual image display unit to the viewer side;
A housing for housing the real image display unit and the virtual image display unit;
The transmission / reflection member is disposed in the housing so as to be interposed between the real image display unit and the virtual image display unit,
A real image by the first display light emitted from the real image display unit and transmitted through the transmission / reflection member, and a virtual image by the second display light emitted from the virtual image display unit and reflected by the transmission / reflection member. Are visually recognized in a state where they are juxtaposed ,
The display device according to claim 1, wherein a required portion of the transmission / reflection member extends above the housing so that the virtual image is superimposed on a landscape .

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