JP2011195003A - Display device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display device for a vehicle capable of switching a display scale without restrictions by a display unit.SOLUTION: In this display device 1 for the vehicle for performing a display by switching the display scale by the display unit 4, the display unit 4 is made a dot matrix type display unit 4. Data for plotting to be displayed on the display unit 4 is constituted of at least a bar graph image 81 and background images 82 to 84 including segment-shaped transmission parts 82a to 84a transmitting the bar graph image 81 and provided by a plurality of number for each display scale. The display device 1 includes a data storing part 22 for plotting for storing the data for plotting, and a control means 2 for generating plotting data to be displayed on the display unit 4 by using the data for plotting based on vehicle information and outputting the plotting data to the display unit 4.

Description

  The present invention relates to a vehicular display device, and more particularly to a vehicular display device that switches and displays a display scale.

  2. Description of the Related Art Conventionally, a vehicle display device that displays a display scale by switching is provided with a liquid crystal display that performs bar graph display. In this liquid crystal display, there is one that can switch the scale interval in two ways (for example, Patent Literature). 1).

JP 58-190765 A

  However, in the conventional vehicle display device, when the liquid crystal display displays a bar graph with n segments, the display scale is switched to display twice, four times, or 1/2. There is a problem that it is impossible to switch the display scale without restriction by the display because it is restricted by a multiple of 2 such as double.

  Accordingly, the present invention focuses on the above-described problems, and an object thereof is to provide a vehicular display device capable of switching a display scale without restriction by a display.

  The display device for a vehicle according to the present invention is a display device for a vehicle that displays by switching a display scale with a display. The display is a dot matrix display, and the drawing data displayed on the display is at least A drawing data storage unit that includes a bar graph image and a background image that includes a plurality of segment-shaped transmission units that transmit the bar graph image and that are provided for each display scale, and includes vehicle data. And control means for generating drawing data to be displayed on the display unit using the drawing data and outputting the drawing data to the display unit.

  Further, the control means generates the drawing data by displacing the bar graph image based on the vehicle information and transmitting the bar graph image from the transmission part of the background image.

  Further, the control means displaces the bar graph image based on the vehicle information, and when the end portion of the bar graph image is located at an arbitrary transmission portion, the end portion of the bar graph image is the arbitrary position. The drawing data is generated so as to be between the transmissive part and the transmissive part adjacent to the lower side of the arbitrary transmissive part.

  Further, the control means displaces the bar graph image based on the vehicle information, and when the end portion of the bar graph image is located at an arbitrary transmission portion, the end portion of the bar graph image is the arbitrary position. The drawing data is generated so as to be between the transmissive part and the transmissive part adjacent to the upper side of the arbitrary transmissive part.

  The present invention can provide a vehicular display device capable of switching a display scale without restriction by a display.

The block diagram of the display apparatus for vehicles of 1st Embodiment of this invention. Explanatory drawing which shows the display content of the embodiment. The figure which shows the background image of the embodiment. The figure which shows the bar graph image of the embodiment. Explanatory drawing which shows the operation | movement of the embodiment. The figure which shows the other background image of the embodiment. The figure which shows the further other background image of the embodiment.

  Hereinafter, a first embodiment of the present invention will be described with reference to the accompanying drawings.

  The vehicle display device 1 of the present invention is a so-called retrofit meter that is mounted on the vehicle, separately from the pre-equipped instrument of the vehicle. In this embodiment, the traveling speed of the vehicle and the rotational speed of the engine of the vehicle are displayed.

  The vehicle display device 1 includes a control unit 2, a display 4, and an operation unit 5. Reference numeral 6 denotes a sensor, and reference numeral 7 denotes a control unit that receives a signal from the sensor 6.

  The control means 2 is configured by connecting a microcomputer (hereinafter referred to as a microcomputer) 21, a drawing data storage unit 22, and a graphic controller 23 by bus connection.

  The microcomputer 21 receives a detection signal of vehicle information such as the engine speed and the traveling speed of the vehicle from the sensor 6 via the control unit 7 and calculates a display control signal based on the various vehicle information. In order to exchange data with a RAM that can be read and rewritten for temporarily storing calculation processing results and the like in this CPU, a ROM that stores a control program and control data, a drawing data storage unit 22, a graphic controller 23, and the like. Are connected to the input / output interface using a bus. Note that the microcomputer 21 may input a detection signal directly from the sensor 6.

  In addition, the microcomputer 21 outputs to the graphic controller 23 a control signal that prompts a drawing data generation process based on each vehicle information.

  For example, a non-volatile storage medium such as a flash memory or a ROM can be applied to the drawing data storage unit 22, and component information for generating drawing data is stored as drawing data. The drawing data includes, for example, a character image for speed display, a bar graph image 81 shown in FIG. 4, and a plurality of background images 82 to 84 having different display scales as shown in FIGS. I have. Each of the background images 82 to 84 displays engine rotation. FIG. 3 is a background image 82 with a display scale of 6000 rotations, FIG. 6 is a background image 83 with a display scale of 3000 rotations, and FIG. The background image 84 has a display scale up to 10,000 rotations. Each of the background images 82 to 84 includes a plurality of segment-shaped transmission portions 82 a to 84 a that transmit the bar graph image 81. Each transmission part 82a-84a is substantially rectangular, and one is equivalent to 100 rotations of an engine rotation. The background image 82 includes 60 transmissive portions 82a, the background image 83 includes 30 transmissive portions 83a, and the background image 84 includes 100 transmissive portions 84a. In the present embodiment, each of the background images 82 to 84 also includes a scale and a character image. As the drawing data, information including attribute data indicating a display position or the like is used. A cross mark C in FIG. 4 represents the center of rotation of the bar graph image 81.

  The graphic controller 23 selects and reads the drawing data 81 and 82 to 84 stored in the drawing data storage unit 22 based on the control signal from the microcomputer 21, and sends the drawing data to the graphic controller 23 for each vehicle information. It is stored in the provided storage unit. The graphic controller 23 synthesizes the drawing data 81 and 82 to 84 stored in the storage unit based on a control signal from the microcomputer 21 and outputs the synthesized data to the display 4 as drawing data. The graphic controller 23 may be integrated with the microcomputer 21.

  For example, a storage medium such as SD-RAM or V-RAM can be applied to the storage unit provided in the graphic controller 23, and drawing data can be temporarily stored under the control of the graphic controller 23.

  The display 4 is a dot matrix type display, and for example, a TFT liquid crystal display element can be used. Further, the display 4 can display a desired image based on the drawing data from the graphic controller 23 of the control means 2 by driving a liquid crystal driver (not shown).

  The display 4 uses a single display element, and as shown in FIG. 2, the speed display unit 41 displays the speed and the engine rotation display unit 32 displays the engine rotation. The speed display unit 41 is a character display, and shows 0 km / h in FIG. The engine rotation display unit 42 is a display based on the background image 82 up to 6000 rotations of the display scale, and shows 3400 rpm in FIG. The drawing data is output every predetermined screen update cycle (for example, 16.7 milliseconds), and the screen of the display 4 is updated based on this timing.

  The operation unit 5 is a transparent touch panel provided on the front surface of the display 4 and operates the vehicle display device 1. A switch image or the like (not shown) is displayed on the display unit 4. When the switch image or the like is touched, the display unit 4 detects the switch image or the like and operates the vehicle display device 1. For example, in this embodiment, when the appropriate display scale of engine rotation is selected by the vehicle to which the vehicle display device 1 is attached, the selection operation is performed by the operation unit 5.

  In the present embodiment, the sensor 6 detects the number of rotations of a crankshaft of an engine (not shown). In the present embodiment, only one sensor 6 is shown, but originally, a plurality of sensors such as a speed sensor for detecting the vehicle speed are provided as sensors for detecting the state of the vehicle.

  The control unit 7 includes a microcomputer and receives signals from a plurality of other sensors including the sensor 6 and transmits signals from the sensor 6 to the control unit 2.

  With the above configuration, the vehicle information is displayed and output on the display 4.

  Next, the control method of the control means 2 will be described taking the display of engine rotation as an example.

  The microcomputer 21 of the control means 2 receives an engine rotation detection signal, which is one of vehicle information, from the sensor 6 via the control unit 7, and receives the bar graph image 81 stored in the drawing data storage unit 22 from the sensor 6. Displacement (rotation) based on the signal. In the present embodiment, when the bar graph image 81 is rotated based on the signal from the sensor 6, the bar graph image 81 is rotated with correction. Hereinafter, the correction will be described. As shown in FIG. 5, when the signal from the sensor 6 is 3450 rotations, as shown in FIG. 5, when the bar graph image 81 is rotated based on the detection signal from the sensor 6, the end of the bar graph image 81 is corrected. The position is P1. However, when the end portion of the bar graph image 81 is at the position P1, it is positioned in the middle of the transmissive portion 82a corresponding to 3500 rotations, and a part of the transmissive portion 82a constituting the segment is missing and looks bad. . Therefore, the end portion of the bar graph image 81 is located between the transmission part 82a1 and the transmission part 82a2 adjacent to the lower side of the transmission part 82a1 so that a part of the transmission part 82a is not visible. Generate drawing data. That is, when the signal from the sensor 6 is 3450 rotations, the number of rotations less than 100 units is rounded down to 3400 rotations, and the bar graph image 81 has the end of the bar graph image 81 at the position P2. Rotate.

  Drawing data is generated by rounding or rounding up the number of rotations less than 100 units so that it is between the transmission part 82a1 and the transmission part 82a3 adjacent to the upper side of the transmission part 82a1. Also good.

  The microcomputer 21 sends the rotated bar graph image 81 to the storage unit of the graphic controller 23.

  The graphic controller 23 superimposes the background image 82 previously selected and stored in the storage unit on the bar graph image 81, and draws the drawing data that the bar graph image 81 transmits from the transmission unit 82a of the background image 82. It is generated and output from the graphic controller 23 to the display unit 4.

  In the present embodiment, the bar graph image 81 has an arc shape, but is not limited to the present embodiment, and may be a linear shape. In this case, the displacement of the bar graph image is also displaced in the linear direction.

  With the configuration described above, it is possible to provide a vehicular display device capable of switching a display scale without restriction by a display.

  Moreover, the bar graph image is provided for each segment by providing the bar graph image 81 and the background images 82 to 84 provided with a plurality of segment-like transmission parts 82 a to 84 a that transmit the bar graph image 81 and provided for each display scale. That is, when one segment shows 100 revolutions at 6000 revolutions, the storage capacity can be reduced as compared with the case where drawing data is stored as 60 segments. In particular, when a plurality of display scales are displayed as in the present embodiment, a storage capacity for storing segment drawing data is required for each of the plurality of display scales. Since only the image 81 is sufficient, an increase in storage capacity can be suppressed, a storage unit with a small storage capacity can be employed, and cost can be reduced. Also, when drawing data is read, there is no need to read data for each segment, and there is an effect that processing by the control means 2 is quick.

  The present invention is applicable to a display device for a vehicle that displays by switching a display scale.

DESCRIPTION OF SYMBOLS 1 Display apparatus for vehicles 2 Control means 21 Microcomputer 22 Data storage part for drawing 23 Graphics controller 4 Display device 81 Bar graph image 82, 83, 84 Background image 82a, 82a1, 82a2, 82a3, 83a, 84a Transmission part

Claims (4)

In a vehicular display device that displays a display scale by switching on a display unit, the display unit is a dot matrix type display unit, and the drawing data displayed on the display unit includes at least a bar graph image and the bar graph image A plurality of background images provided for each display scale, and a drawing data storage unit for storing the drawing data, and the drawing data based on vehicle information. A vehicle display device comprising control means for generating drawing data to be displayed on the display and outputting the drawing data to the display. The control means generates the drawing data by displacing the bar graph image based on the vehicle information and transmitting the bar graph image from the transmission part of the background image. The vehicle display device described. The control means displaces the bar graph image based on the vehicle information, and when an end portion of the bar graph image is located at an arbitrary transmission portion, an end portion of the bar graph image is an arbitrary position of the arbitrary bar graph image. The vehicle display device according to claim 2, wherein the drawing data is generated so as to be between a transmission part and a transmission part adjacent to a lower side of the arbitrary transmission part. The control means displaces the bar graph image based on the vehicle information, and when an end portion of the bar graph image is located at an arbitrary transmission portion, an end portion of the bar graph image is an arbitrary position of the arbitrary bar graph image. The vehicle display device according to claim 2, wherein the drawing data is generated so as to be between a transmission part and a transmission part adjacent to the upper side of the arbitrary transmission part.

Images