JP2015215283A - Display device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display device for a vehicle in which: in indicating the same indicator part having different scale intervals by rotating a pointer, the pointer can be smoothly rotated to indicate the indicator part without impairing merchantability.SOLUTION: A display device 1 for a vehicle according to the present invention includes: input means 5 for receiving the input of vehicle information; an indicator 3 that comprises indicators 3a and 3b having scale intervals with at least two different resolutions; a pointer 2 that indicates the indicator 3; and pointer driving means 4 for determining an indicated value Xwith a delay from the vehicle information input to the input means 5 and causing the pointer 2 to indicate a position on the indicator 3 corresponding to the indicated value X. The pointer driving means 4 changes the degree of delay N according to the indicators 3a and 3b having the scale intervals of the indicator corresponding to the indicated value X.

Description

  The present invention relates to a vehicular display device that gives instructions to turn the same index portion mixed with different scale intervals with a pointer.

  Conventionally, in a pointer-type instrument that indicates the traveling speed (vehicle speed) of a vehicle, an average process or a delay process is applied to a value periodically sampled from a vehicle speed sensor, thereby smoothing the pointing rotation of the pointer and improving the visibility. A display device for a vehicle is disclosed in Patent Document 1.

  Further, for example, in order to prevent unstable behavior of the pointer in an extremely low speed range where the vehicle speed is 10 km / h or less, when the vehicle speed is less than a predetermined value from 0, the first linear drive whose instruction is smaller than the detected vehicle speed Patent Document 2 discloses a vehicle display device that switches to the second linear drive that substantially matches the detected vehicle speed when the vehicle speed is equal to or higher than a predetermined value.

  In addition, for the purpose of improving the visibility of the display device for vehicles, the scale interval of the band where the reading accuracy is set to be high among the scale intervals of the indicator section from the lower limit value to the upper limit value of the indication value of the pointer is set to other bands. Patent Document 2 discloses a technique that improves reading accuracy over a wider area.

JP-A-8-327664 JP 2003-139578 A Japanese Patent Laid-Open No. 1-096559

  However, when the same indicator part with different scale intervals mixed is instructed to rotate with the pointer, the same indication is used in all indicated areas due to the difference in the angle (resolution) to be rotated corresponding to the change amount of the instruction value. When the delay process is performed, there is a problem in that the rotation of the pointer is finely shaken at the boundary part of the index part having different scale intervals, and the merchantability is impaired. The technique disclosed in any of Patent Documents 1 to 3 described above is used. But it is not solved.

  The present invention has been made in view of the above-described problems, and is a vehicle display that provides a smooth rotation instruction without impairing merchantability when the same index portion having different scale intervals is instructed to rotate with a pointer. An object is to provide an apparatus.

A vehicle display device according to the present invention includes:
Input means for inputting vehicle information;
An index composed of scale intervals of at least two different resolutions;
A guideline indicating the indicator;
A pointer driving means for determining an instruction value by giving a delay to the vehicle information input from the input means, and for indicating the position of the index corresponding to the instruction value with the pointer;
A vehicle display device comprising:
The pointer driving means changes the degree of the delay according to the scale interval of the index corresponding to the instruction value.

  Preferably, the pointer driving means of the vehicle display device according to the present invention reduces the degree of delay as the scale interval of the indicator increases.

  ADVANTAGE OF THE INVENTION According to this invention, when instruct | indicating rotation with the pointer about the same index part with which different scale intervals were mixed, the display apparatus for vehicles which can perform rotation instruction smoothly, without impairing merchantability can be provided.

The front view of the display apparatus for vehicles which is an embodiment of the present invention. The electrical block diagram of the display apparatus for vehicles which is the embodiment. The control flowchart figure of the display apparatus for vehicles which is the embodiment. The figure which shows the relationship between the input vehicle speed and the instruction | indication angle of a pointer | guide in the display apparatus for vehicles which is the embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  The vehicle display device 1 according to the present invention is a pointer-type meter including a pointer 2, an index 3, a pointer driving unit 4, and an input unit 5. The vehicle display device 1 inputs various vehicle information such as a vehicle speed, an engine speed, and a remaining fuel amount from an input unit 5 made of, for example, a CAN (Controller Area Network), and an index corresponding to the vehicle speed input by the pointer driving unit 4 By instructing the position 3 with the pointer 2, the vehicle speed is presented to the driver of the vehicle on which the vehicle display device 1 is mounted.

  The index 3 is, for example, a scale printed on a dial and index numbers. A scale corresponding to 0 km / h is a starting point, and a scale of 0 to 100 km / h is set at a resolution of 1.135 ° per 1 km / h. Consists of a first index 3a configured and a second index 3b configured with a resolution of 0.75 ° per km / h with a scale of 100 to 220 km / h starting from the end (100 km / h) of the first index 3a. To do.

  The pointer driving means 4 includes, for example, a storage device used for storage of a predetermined program and various data, a storage area at the time of calculation, a CPU for performing arithmetic processing according to the predetermined program, and the microcomputer. A stepping motor that is controlled to rotate the pointer at a predetermined angle, and is mounted on the circuit board, and the microcomputer controls the stepping motor in accordance with vehicle information input from the input means 5. Is rotated to a predetermined angle.

  Hereinafter, a control procedure in which the pointer driving unit 4 instructs the vehicle speed input from the input unit 5 with the pointer 2 will be described.

First, the pointer driving means 4 samples the vehicle speed input from the input means 5 at a cycle of several tens of milliseconds, and determines the target vehicle speed D _t at time t based on the sampled vehicle speed (S1 in FIG. 3). ).

Next pointer drive means 4, the target vehicle speed D _t is determined belongs to either of the range of the first indicator 3a and the second indicator 3b, if the target vehicle speed D _t belongs to the first index 3a will be described later delayed set the correction value N to 10, the target vehicle speed D _t may belong to the second indicator 3b sets the delay correction value N to be described later to 15 (S2 in Fig. 3).

Next pointer drive means 4, a material obtained by dividing the difference between the current instruction value X _t-1 and the target vehicle speed D _t by the delay correction value N, the delay at time t in addition to the current instruction value X _t-1 The processed vehicle speed D ′ _t is obtained (S3 in FIG. 3).
Here, as the delay correction value N is smaller, while the response time to reach the target vehicle speed D _t is shorter is improved, there is a possibility that the jumping of much guidance in response sensitively to the vehicle speed of sampling occurs.

Next, the pointer driving means 4 follows the average value D ′ _avg of the post-delay vehicle speed D ′ _t obtained in S4 of FIG. 3 and the post-delay post-delay vehicle speed D ′ obtained similarly. calculated by equation (2), this is an instruction value X _t of the pointer at time t (S4 in FIG. 3). M is appropriately set according to the sampling period. For example, when the sampling period is several tens of milliseconds, about 5 is preferable.

Next pointer drive means 4, as the relative angle θ from the scale corresponding to 0 km / h for the corresponding vehicle speed to the instruction speed X _t shown in FIG. 4 guidance instructs the control rotating pointer ( S5 in FIG.

  By repeating the control procedure of S1 to S5 of FIG. 3 described above, the rotation of the pointer is not shaken minutely at the boundary part of the index part having different scale intervals (the boundary part between the first index 3a and the second index 3b). The pointer driving means 4 can smoothly turn the pointer following the vehicle speed input from the input means 5.

Having described embodiments of the present invention is not limited thereto, as long as you change the response respectively to the target vehicle speed D _t in the first index 3a and the second indicator 3b. For example, the constant M in the averaging process in S4 of FIG. 3 may be changed.

  Further, the setting of the delay correction value N in S2 of FIG. 3 may have hysteresis at the boundary portion between the first index 3a and the second index 3b.

  Further, the index 3 is not limited to the one printed on the dial, but may be constituted by an image displayed on a liquid crystal display, for example.

  The present invention is suitable, for example, as a vehicle information display device mounted on a moving body including an automobile, a motorcycle, an agricultural machine, or a construction machine.

DESCRIPTION OF SYMBOLS 1 ... Display apparatus for vehicles 2 ... Pointer 3 ... Index 3a ... 1st index 3b ... 2nd index 4 ... Pointer drive means 5 ... Input means

Claims (2)

Input means for inputting vehicle information;
An index composed of scale intervals of at least two different resolutions;
A guideline indicating the indicator;
A pointer driving means for determining an instruction value by giving a delay to the vehicle information input from the input means, and for indicating the position of the index corresponding to the instruction value with the pointer;
A vehicle display device comprising:
The display device for a vehicle, wherein the pointer driving means changes the degree of the delay according to a scale interval of the index corresponding to the instruction value. The vehicle display device according to claim 1, wherein the pointer driving unit decreases the degree of the delay as the scale interval of the index increases.

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