JP2008190940A - Display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display device capable of securing a sufficiently wide display area, and indicating a wide angle range by a pointer or the like. <P>SOLUTION: A rotator 3 is provided in front of a screen 30a of a display member 30 such as a liquid crystal display panel. The rotator 3 is formed of a transparent material, and the pointer 5b is described on the front face 3b. When a display content 33 such as a speed scale is displayed in a display area 32 on the screen 30a, and the rotator 3 is rotated by a driving mechanism, the speed scale can be indicated by the pointer 5b. Since the pointer 5b exists in front of the screen 30a, a stereoscopic display is possible, and the pointer 5b can be rotated in a wide angle range. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a display device in which a rotating plate is provided in front of a screen of a display member such as a liquid crystal display panel, and an indicator for indicating a part of information displayed on the screen is provided on the rotating plate. .

  A display device that displays information such as the traveling speed of the vehicle is provided in front of the driver's seat of the automobile. This display device has an instrument panel in which a scale indicating a traveling speed or the like is described as fixed information, and a pointer that rotates in front of the instrument panel and indicates a numerical value displayed on the scale. Yes.

  As the display device, a liquid crystal display panel capable of switching display contents is also used. In order to make the liquid crystal display panel display in place of the conventional instrument panel, the vehicle running speed is displayed numerically, or the number of bar graph displays is increased or decreased according to changes in the vehicle running speed, etc. This method is required. However, it is difficult for the driver to intuitively determine the vehicle speed or the like in the display that changes the number or the display that increases or decreases the bar graph. In addition, unlike a conventional instrument panel and a display device having a pointer, the display by the liquid crystal display panel does not have a three-dimensional effect, and it is difficult for the driver to know the contents intuitively only by looking at the display contents for a short time.

  Therefore, Patent Documents 1 to 3 below disclose a display device using a liquid crystal display panel and a rotary pointer. In the on-vehicle display device described in Patent Document 1, the pointer driving unit that rotates the pointer is provided at a position that is off the screen of the liquid crystal display panel, and only the pointer is provided at a position that overlaps the screen of the liquid crystal panel. The scale displayed on the liquid crystal display panel is instructed by the pointer rotated by the power of the pointer driving unit.

  The display device described in Patent Document 2 is provided with a donut-shaped scale plate having a large hole in the center, and a disc-shaped liquid crystal display panel positioned behind the scale plate, and the display content of the liquid crystal display panel is Visible from the hole in the scale plate. A drive unit for rotating the pointer is provided behind the scale plate and the liquid crystal display panel. The pointer rotated by the drive unit is bent into a crank shape, passes forward through the outer peripheral edge of the disc-shaped liquid crystal display panel, and further extends forward of the scale plate. By rotating the pointer with the driving unit, the scale displayed by printing or the like on the surface of the scale plate is indicated by the pointer.

In the display device described in Patent Document 3, a bearing is fixed to the front surface of the liquid crystal display panel with an adhesive or the like, and a base portion of a pointer is rotatably supported by the bearing. A magnet is fixed to the pointer, and a coil is provided on the back of the liquid crystal display panel. By energizing the coil, the pointer is rotated, and the scale displayed on the liquid crystal display panel is indicated by the pointer.
JP-A-7-112629 JP 2005-181301 A JP 2004-118037 A

  In the display device described in Patent Document 1, the pointer drive unit is provided at a position that is off the screen of the liquid crystal display panel. For this reason, the range in which the pointer can be rotated at a position overlapping the screen of the liquid crystal display panel is limited to less than 180 degrees, which makes it very difficult to see the instrument display.

  The display device described in Patent Document 2 can ensure a wide rotation angle of the pointer. However, since the pointer extends forward through the peripheral edge of the liquid crystal display panel, the peripheral edge of the liquid crystal display panel must be circular. Such a circular liquid crystal display panel is extremely expensive and lacks practical utility.

  In addition, the display device described in Patent Document 3 is such that the pointer located in front of the liquid crystal display panel is driven by a coil provided behind the liquid crystal display panel, but the magnetic force of the magnet is considerably strong. Unless this is done, it is difficult to rotate the pointer accurately.

  The present invention solves the above-described conventional problems, and has a relatively simple structure and enables display of an index by rotating an index or the like in a wide angle range in front of the display member screen. The purpose is to provide.

The present invention includes a display member having a screen for displaying information and a rotating body positioned in front of the screen, and the rotating body is surrounded by a circular guide portion and the guide portion and faces the screen. And an opposite area to
A support member configured to support the guide portion at a plurality of locations and make the rotating body rotatable about a center of a circle of the guide portion; and a drive mechanism for rotating the rotating body;
The facing area is provided with a see-through part through which the display content on the screen can be seen through and a rotation display part that moves in front of the screen as the rotating body rotates. It is.

  In the present invention, the display member can change display information on the screen. For example, the display member is a liquid crystal display panel. However, the display member may be a plasma display panel, an electroluminescence display panel, an LED display panel, or the like.

  In the present invention, a scale is displayed on the screen, and the rotation display unit is an index that indicates a position on the scale.

  In the present invention, the rotating body is a disc having an outer peripheral edge as the guide portion. The guide portion has teeth arranged at a constant pitch in the circumferential direction, and the drive mechanism has a drive gear that meshes with the teeth.

  In the display device of the present invention, since the screen of a display member such as a liquid crystal display panel is provided on the back of the rotating body, the display on the screen can be seen through the see-through portion of the rotating body. Furthermore, when the rotating body rotates in front of the screen of the display member, the rotation display unit written on the rotating body rotates in front of the screen, so that display with a three-dimensional effect is possible. Further, since the rotating body can be rotated at an angle of 360 degrees or more, various scales can be displayed in a wide angle range.

  FIG. 1 is an exploded perspective view showing a display device according to an embodiment of the present invention, and FIG. 2 is a longitudinal sectional view of the display device shown in FIG. FIG. 3 is a front view partially showing a display state of the display device. FIG. 4 is a front view partially showing a display state in a display device according to another embodiment.

  The display device 1 shown in FIGS. 1 and 2 is installed in front of a driver's seat in a vehicle cabin. The A side of the display device 1 is the front facing the driver, and the B side is the rear. The display device 1 has a substrate 2. The substrate 2 is formed of a synthetic resin material or the like, and a circular through hole 2a is opened at the center thereof.

  A rotating body 3 is provided on the front surface 2b facing the front side (A side) of the substrate 2 and in front of the through hole 2a. The rotating body 3 is made of a transparent synthetic resin material such as an acrylic plate or a polycarbonate plate. The rotating body 3 is circular, and the peripheral edge thereof is a guide portion 3a. In the guide portion 3a, teeth 3c of a predetermined module that are carved at a constant pitch in the circumferential direction are formed over the entire circumference of the peripheral portion of the rotating body 3.

  In the rotator 3, a region surrounded by the guide portion 3 a is a counter region 4. In the facing area 4, a rotation display portion 5 formed in the painting process is provided on the front surface 3 b facing forward. The rotation display unit 5 includes a small circular center display 5a located at the center of the circular rotator 3, and a pointer 5b that is an index extending linearly from the center display 5a in the radial direction. The rotating body 3 is a non-transparent part in which the portion where the rotation display part 5 is formed is non-transparent or translucent. In the rotator 3, a region other than the rotation display unit 5 is transparent, and the transparent region is a see-through unit 6 through which information on the back (B side) can be visually observed.

  On the front surface 2b of the substrate 2, support members 10 are provided at three locations outside the through hole 2a. The support member 10 includes a shaft 11 fixed to the substrate 2 and a support roller 12 that is rotatably supported by the shaft 11. As shown in FIG. 2, the support roller 12 has a central portion in the axial direction which is a small diameter portion 12 a having the smallest diameter, and a taper surface 12 b in which the diameter gradually increases in the forward direction toward the A direction. The rear side is a tapered surface 12c whose diameter gradually increases toward the B direction. As for the rotary body 3, the edge part by the side of A and the edge part by the side of B of the guide part 3a are supported by the taper surface 12b and the taper surface 12c of each support roller 12, respectively. As a result, the rotator 3 maintains a posture parallel to the front surface 2b of the substrate 2 and is supported rotatably about the center of the rotator 3 (center of the circular guide portion 3a).

  A driving mechanism 20 is provided on the substrate 2. The drive mechanism 20 includes a shaft 22 fixed to the front surface 2 b of the substrate 2 and a drive gear 21 that is rotatably supported by the shaft 22. The drive gear 21 meshes with teeth 3 c formed on the guide portion 3 a of the rotating body 3. In the guide portion 3a of the rotator 3, teeth 3c are formed over the entire circumference, and the engagement between the drive gear 21 and the teeth 3c continues regardless of the rotation position of the rotator 3.

  In the drive mechanism 20, the motor 23 is fixed to the substrate 2, and the rotational force of the motor 23 is reduced by the reduction gear group 24 and transmitted to the drive gear 21. The motor 23 is a stepping motor or a servo motor.

  A display member 30 is provided on the back portion (B side) of the substrate 2. The display member 30 has a panel shape, and the A side surface thereof is a screen 30a on which information can be displayed. Spacers 31 are provided around the surface on the A side of the display member 30. The spacer 31 is fixed to both the display member 30 and the substrate 2, and the substrate 2 and the screen 30a are separated by a certain distance. Since there is a distance between the screen 30a of the display member 30 and the rotating body 3, there is also a distance between the rotation display unit 5 formed on the rotating body 3 and the display content on the screen 30a. As a result, a display with a stereoscopic effect is possible.

  The display member 30 can change the information displayed on the screen 30a and can display a moving image. In this embodiment, the display member 30 is a liquid crystal display panel. The liquid crystal display panel includes illumination means such as a backlight.

  The screen 30 a of the display member 30 has a circular display area 32. The display area 32 has the same area as the rotating body 3 or an area slightly larger than the rotating body 3. The display content 33 displayed in the display area 32 can be seen from the front through the see-through part 6 of the rotating body 3.

  A cover 40 is installed in front of the substrate 2 (A side). The cover 40 is provided with a circular display window 41, and the side wall portion is provided with a notch portion 42 for escaping the reduction gear group 24. As shown in FIG. 1, the center of the display window 41, the center of rotation of the rotating body 3, and the center of the display area 33 are located on a common center line O. As shown in FIGS. 2 and 3, the support member 10 and the drive mechanism 20 provided on the substrate 2 are covered with a cover 40, and from the display window 41, the facing region 4 of the rotating body 3 and the display member. The display area 32 of the 30 screens 30a can be visually observed.

  As shown in FIG. 3, when the display device 1 is viewed from the front, the rotation display unit 5 provided on the rotating body 3 can be seen on the front side, and the transparent part 6 of the rotating body 3 is seen through, and the back side thereof The display content 33 displayed in the display area 32 of the screen 30a can be visually observed.

  In the display example shown in FIG. 3, the display content 33 in the display area 32 is a speed scale 34 that displays the speed (km / h) of the vehicle. The display content 33 has display locations 35 and 36 other than the speed scale 34, and various information is displayed at the display locations 35 and 36. In the display locations 35 and 36, a stop image and a moving image are displayed, and the display contents are switched according to the driving situation. For example, the number of traveling distances and the number of trip distances of the vehicle, diagnostic information of each function of the automobile, road information obtained in conjunction with the car navigation device, and information such as the remaining distance and direction to the traveling destination are displayed.

  Since the display member 30 is a liquid crystal display panel and can change the display content of the screen 30a, for example, the range of the speed scale 34 may be changed according to the actual traveling speed. For example, in low-speed traveling, the full range of the speed scale 34 is 110 km / h, and the full range can be switched to 210 km / h during high-speed traveling.

  The rotating body 3 is rotated by the drive mechanism 20 so as to correspond to the display range of the speed scale 34. Then, the speed scale 34 is instructed by the pointer 5 b written on the rotating body 3. The rotating body 3 can rotate at an angle of 360 degrees or more. Therefore, display angles such as speed display can be secured in a wide range.

FIG. 4 is a front view showing the display device 110 according to the second embodiment of the present invention.
In this embodiment, a scale 134 for speed display or the like is displayed in the display area 32 of the screen 30a. In addition, an indicator such as an arrow is written on the rotating body 3 as the rotation display unit 105. When the rotating body 3 rotates, the scale can be instructed by the rotation display unit 105 indicated by an arrow.

1 is an exploded perspective view showing a display device according to a first embodiment of the present invention; Sectional drawing of the display apparatus shown in FIG. Front view showing a display example when the display device is viewed from the front, The front view which shows the example of a display when the display apparatus of the 2nd Embodiment of this invention is seen from the front,

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Display apparatus 2 Board | substrate 2a Through-hole 3 Rotating body 3a Guide part 3b Front surface 4 Opposite area 5 Rotation display part 5b Pointer 6 See-through part 10 Support member 12 Support roller 20 Drive mechanism 21 Drive gear 30 Display member 30a Screen 32 Display area

Claims (6)

A display member having a screen for displaying information; and a rotator positioned in front of the screen, the rotator being surrounded by a circular guide portion and the guide portion, and a counter area facing the screen. Have
A support member configured to support the guide portion at a plurality of locations and make the rotating body rotatable about a center of a circle of the guide portion; and a drive mechanism for rotating the rotating body;
A display characterized in that a see-through unit through which the display content on the screen can be seen through and a rotation display unit that moves in front of the screen as the rotating body rotates are provided in the facing area. apparatus.   The display device according to claim 1, wherein the display member is capable of changing display information on the screen.   The display device according to claim 2, wherein the display member is a liquid crystal display panel.   The display device according to claim 1, wherein a scale is displayed on the screen, and the rotation display unit is an index that indicates a position on the scale.   The display device according to claim 1, wherein the rotating body is a disc having an outer peripheral edge serving as the guide portion.   The display device according to claim 1, wherein the guide portion includes teeth arranged at a constant pitch in a circumferential direction, and the drive mechanism includes a drive gear that meshes with the teeth. .

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