JP2008056193A - Vehicular display unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicular display unit capable of easily confirming whether information housed in a plurality of memories have consistency. <P>SOLUTION: The vehicular display device has a display means 6 for displaying various information about a vehicle, a memory section capable of electrically rewriting data by using a memory rewriting device, a control means 3 for computing to control the display means 6 based on a control program and the control data housed in the memory section, and an external memory means 4 provided possible to be electrically connected to the control means 3 and housing information related to the control program or the control data and capable of electrically rewriting the data. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a display device for a vehicle comprising display means for displaying various types of vehicle information and control means for controlling the display means. In particular, information such as a control program and control data is rewritten by an external device. It is suitable for a possible vehicle display device.

2. Description of the Related Art Conventionally, a vehicle display device mounted on a vehicle such as an automobile is equipped with a control unit such as a microcomputer so that many functions can be realized with a limited housing. In addition, an electrically rewritable EEPROM or flash ROM may be used as a memory for storing a microcomputer control program and control data. If at least part of the control program and control data is stored in such an electrically rewritable nonvolatile semiconductor memory, the control program and control data can be upgraded without removing the memory. Information can be rewritten (for example, described in Patent Document 1).
JP 2002-46556 A

  However, in order to satisfy various functions, the vehicle display device may be provided with a plurality of electrically rewritable nonvolatile semiconductor memories as described above. In this case, it is necessary to perform an update operation on the information stored in each memory, and a complicated determination operation is required, for example, when a part of the update operation is not necessary depending on the presence or absence of a different function for each vehicle type. there were.

  In addition, if some necessary update work is not performed, the information stored in each memory may not be consistent and the device may not operate normally, such as erroneous display. Attention was necessary.

  Accordingly, an object of the present invention is to provide a display device for a vehicle that has been made paying attention to the above-described problem and can easily confirm whether or not information stored in a plurality of memories is consistent. There is to do.

  As described in claim 1, the display device for a vehicle according to the present invention has a display means for displaying various information of the vehicle and a first storage means capable of electrically rewriting data using an external device. And a control means for performing arithmetic processing for controlling the display means in accordance with the control program and control data stored in the first storage means, and provided so as to be electrically connectable to the control means, And a second storage means for electrically rewriting data for storing relevant information related to the control program or the control data, wherein the control means comprises the control It is determined whether or not the program or the control data is consistent with the related information, and when it is determined that they are not consistent, the display means is controlled so as to perform a display different from normal. Characterized in that by comprising.

  Further, as described in claim 2, in the vehicle display device according to claim 1, when the control means determines that they are not consistent in the determination, the display prompts an operation for solving the display. The display means is controlled to perform the following.

  The present invention relates to a vehicular display device comprising: a display unit that displays various types of vehicle information; and a control unit that controls the display unit based on information stored in the plurality of storage units. It is possible to provide a vehicle display device that can easily confirm whether or not the information stored in the means is consistent.

  Embodiments to which the present invention is applied will be described below with reference to the accompanying drawings.

  FIG. 1 is a block diagram showing an electrical configuration of a vehicle display device mounted on an automobile. The vehicle display device includes a CAN controller 1, an ignition switch 2, a control unit 3, an external storage unit (second control unit) 4, a driver 5, and a display unit 6.

  The CAN controller 1 is a circuit for transmitting and receiving various types of information issued from an ECU of a vehicle using CAN (Controller Area Network) communication. The CAN controller 1 can input various information of a CAN communication protocol capable of multiplex communication, convert it into a protocol that can be processed by the control means 3, and output it to the control means 3, or vice versa. In this case, the control means 3 can transmit / receive a signal from a memory rewriting device (external device) connected to the detachable connector via CAN communication.

  The ignition switch 2 is an ignition switch for a vehicle, and outputs a detection signal in response to turning on or off.

  The control means 3 can be applied with a microcomputer, inputs signals from the CAN controller 1, the ignition switch 2 and the external storage means 4, and generates display information so that the display means 5 operates in response to the signals. And output to the driver 5. The control means 3 stores a CPU that performs arithmetic processing on display information based on various types of information, a readable / rewritable RAM that temporarily stores arithmetic processing results and the like in the CPU, a control program, and control data. A storage unit (first storage unit) composed of the above-described EEPROM, and an input / output interface connected by bus for exchanging data with the input unit 1 and the driver 4.

  The external storage means 4 can be an electrically rewritable EEPROM, flash memory, or the like, and stores necessary related information related to the control program and control data. In this case, the external storage unit 4 can store drawing data to be displayed on the display unit 6 as related information.

  The driver 5 is a circuit that receives display information from the control unit 3 and generates and outputs a drive signal for driving and controlling the display unit 6. The driver 5 can also be configured by the microcomputer described above.

  The display means 6 can be a display such as a liquid crystal display element or an organic EL element, and performs display based on a drive signal from the driver 5. In this case, the display means 6 is provided at a position that is easy for the user to visually recognize, such as an instrument panel surface of the vehicle or an instrument provided on the instrument panel. Note that a head-up display that projects and displays a virtual image on the windshield surface or a dedicated combiner surface can also be applied as the display means.

  With the above configuration, the control unit 3 can cause the display unit 6 to output a display based on various information. Further, the control means 3 is directly connected to the memory rewriting device through a port or transmits / receives a signal from the memory rewriting device connected to the detachable connector as described above via the CAN controller 1. The control program and related information stored in the rewritable area of the storage unit provided in the control unit 3 or the external storage unit 4 can be rewritten. At this time, the control means 3 can indicate the processing status, communication error information, and the like using a display of characters, symbols, progress bars and the like on the display means 6.

  Further, the control program of the control means 3 includes a control program and control data stored in the storage unit at a predetermined timing (for example, after detecting a signal based on an operation of turning off the ignition switch 2). Thus, there is prepared an algorithm for determining whether or not related information such as drawing data capable of performing control processing without any trouble is stored in the external storage means 4.

  In this determination, when the condition is not satisfied, the control unit 3 determines that the information is not consistent, and the display unit 6 displays a display different from the normal display, for example, “data mismatch”. The display information can be output to the driver 5 so as to perform a display indicating the display and a display for prompting an operation for matching.

  The control unit 3 determines whether the control program or control data in the storage unit and the related information in the external storage unit 4 are consistent with each other. It is possible to determine whether or not there is a match by comparing versions and update dates and performing a sum check. Therefore, even if both the control program or control data in the storage unit and the related information in the external storage unit 4 need to be updated, at least some of the information does not match because only one of them is updated for some reason. In such a case, a defect can be confirmed by the above-described processing.

  Such a vehicle display device has a display means 6 for displaying various vehicle information, and a storage unit that can be electrically rewritten using a memory rewriting device, and a control program stored in the storage unit. And control means 3 for executing arithmetic processing for controlling the display means 6 according to the control data, and the control means 3 are provided so as to be electrically connectable, and related information related to the control program or the control data And an external storage means (4) capable of electrically rewriting stored data, wherein the control means (3) matches the control program or the control data with the related information. The display means 6 is controlled so that a display different from the normal display is performed when it is determined that they are not consistent.

  Therefore, the vehicle display device can easily confirm whether or not the information stored in the plurality of storage means is consistent. That is, when any one of the control program, control data, and related information is updated by the operator, it is possible to confirm using the display means 6 in advance, which causes erroneous display due to inconsistency of each information. It becomes.

  In addition, when the control unit 3 determines that the information stored in the plurality of storage units is not consistent in the determination, the control unit 3 performs a display for prompting an operation for solving, thereby matching each information. In addition to being able to easily confirm whether or not there is an error, it is possible to easily solve the problem without instructing the operator to perform operations for matching the information and forcing a complicated confirmation operation.

  The vehicle display device of the present invention has been described by way of example by the configuration of the above-described embodiment, but the present invention is not limited thereto, and other configurations depart from the gist of the present invention. It goes without saying that various improvements and design changes can be made without departing from the scope. For example, the embodiment in which the control program and the control data are stored in the EEPROM has been described. However, any rewritable nonvolatile storage means may be used, and a flash memory may be used. Magnetic storage means such as a hard disk, MO, etc. Magneto-optical storage means can also be used.

  The circuit configuration of the vehicle display device can be variously changed. For example, the CAN controller may be incorporated in the control means. Further, as a terminal for external communication for connecting the control means and the external device, short-distance wireless communication means using infrared rays or radio waves may be used instead of a connector.

The block diagram which shows the outline of the display apparatus for vehicles of embodiment of this invention.

Explanation of symbols

3 Control means 4 External storage means (second storage means)
6 Display means

Claims (2)

Display means for displaying various information of the vehicle and first storage means capable of electrically rewriting data using an external device, and according to a control program and control data stored in the first storage means A control means for executing arithmetic processing for controlling the display means, and an electrical connection that is electrically connectable to the control means and stores related information related to the control program or the control data A second storage means capable of rewriting data, and a vehicle display device comprising:
The control means determines whether or not the control program or the control data and the related information are consistent with each other, and when it is determined that they are not consistent with each other, the display means performs a display different from normal A vehicle display device characterized by controlling the above. 2. The control unit according to claim 1, wherein the control unit controls the display unit so as to perform a display prompting an operation for solving when it is determined in the determination that they are not matched. Vehicle display device.

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