WO2020004092A1 - Vehicle display device - Google Patents

Vehicle display device Download PDF

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Publication number
WO2020004092A1
WO2020004092A1 PCT/JP2019/023799 JP2019023799W WO2020004092A1 WO 2020004092 A1 WO2020004092 A1 WO 2020004092A1 JP 2019023799 W JP2019023799 W JP 2019023799W WO 2020004092 A1 WO2020004092 A1 WO 2020004092A1
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WIPO (PCT)
Prior art keywords
error
information
gdc
image processing
unit
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PCT/JP2019/023799
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French (fr)
Japanese (ja)
Inventor
崇 堀野
剛志 野口
良昭 阿部
幸太 荘
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日本精機株式会社
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Priority to JP2020527403A priority Critical patent/JP7283474B2/en
Publication of WO2020004092A1 publication Critical patent/WO2020004092A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R11/00—Arrangements for holding or mounting articles, not otherwise provided for
    • B60R11/02—Arrangements for holding or mounting articles, not otherwise provided for for radio sets, television sets, telephones, or the like; Arrangement of controls thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
    • B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D7/00—Indicating measured values
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators

Definitions

  • the present invention relates to a display device for a vehicle.
  • the display device described in Patent Literature 1 includes a GDC (Graphic Display Controller) that performs processing for displaying an image on a liquid crystal panel, and a microcomputer that controls the entire display device.
  • a storage unit that stores a mileage of a vehicle an mileage stored in the storage unit is updated, and an error code indicating that an error has occurred is stored in the storage unit.
  • control means for storing for storing.
  • the present invention has been made in view of the above circumstances, and an object of the present invention is to provide a vehicle display device that makes it easy to identify the cause of an error.
  • a display device for a vehicle includes: a display element that displays an image indicating vehicle information; an image processing unit that performs image processing for displaying the image on the display element; A first storage unit in which information is stored; and a meter microcomputer that causes the image processing unit to perform the image processing by outputting a command signal to the image processing unit, wherein the image processing unit includes the image processing unit.
  • a first error detection unit for detecting that an error relating to the unit has occurred, and when the first error detection unit detects that an error has occurred, a type of error, timing information indicating an error occurrence timing, and an error
  • a first error information writing unit that writes the first error information including status information indicating a time status into the first storage unit.
  • FIG. 7 is a diagram illustrating second error information according to an embodiment of the present invention.
  • FIG. 5 is a diagram illustrating first error information according to an embodiment of the present invention.
  • 9 is a flowchart illustrating a procedure of an error information writing process according to an embodiment of the present invention.
  • (A) to (d) according to an embodiment of the present invention are diagrams schematically showing a storage area of a flash ROM.
  • the vehicle display device 1 includes a meter microcomputer 10, a GDC 20, RAMs (Random Access Memory) 15 and 25, a display 30, an EEPROM (Electrically Erasable Programmable Read-Only Memory) 40, A flash ROM (Read-Only Memory) 50.
  • the vehicle display device 1 is a vehicle instrument that displays vehicle information such as a vehicle speed.
  • the display 30 corresponds to a display element, and is, for example, a TFT (Thin Film Transistor) type liquid crystal display.
  • Display 30 receives command signal S2 from GDC 20, and displays an image indicating vehicle information.
  • the RAM 15 is connected to the meter microcomputer 10 and is used as a work area of the meter microcomputer 10 when the meter microcomputer 10 executes processing.
  • the RAM 25 is connected to the GDC 20 and is used as a work area of the GDC 20 when the GDC 20 performs processing.
  • the EEPROM 40 is connected to the meter microcomputer 10 and stores the second error information Er2 and the ODO value indicating the integrated traveling distance of the vehicle.
  • the flash ROM 50 is connected to the GDC 20, and stores the first error information Er1.
  • the flash ROM 50 has a larger storage capacity than the EEPROM 40.
  • the meter microcomputer 10 is a microcomputer including a CPU (Central Processing Unit) for controlling the entire vehicle display device 1, and is connected to the GDC 20, the EEPROM 40, the RAM 15, and a CAN (Controller Area Network).
  • the meter microcomputer 10 receives the vehicle information via the CAN and outputs a command signal S1 for commanding the GDC 20 to perform image processing.
  • the meter microcomputer 10 includes a second error detecting unit 11, a second error information writing unit 12, and an ODO value updating unit 13 as functions.
  • the ODO value updating unit 13 acquires a pulse signal corresponding to the traveling distance as vehicle information, and updates the ODO value stored in the EEPROM 40 according to the acquired pulse signal.
  • the second error detection unit 11 detects that an error relating to the meter microcomputer 10 has occurred.
  • the second error information writing unit 12 writes the second error information Er2 into the EEPROM 40 when the second error detection unit 11 detects that an error has occurred.
  • the second error information Er2 includes indexes Idx0 to Idxn (n is an arbitrary natural number) assigned with a number for each error, an error ID (Identification) Eid indicating the type of error, and an ODO at the time of error.
  • a value Iod and incidental information Iad are included.
  • An error relating to the meter microcomputer 10 is, for example, a communication error between the meter microcomputer 10 and the GDC 20, a stop of the processing of the meter microcomputer 10, and the like.
  • the additional information Iad includes, for example, data of up to 4 bytes, and is arbitrarily set to include more detailed error information than the error IDEid.
  • the GDC 20 corresponds to an image processing unit, and performs image processing for drawing an image on the display 30 by outputting a command signal S2 to the display 30 based on a command signal S1 from the meter microcomputer 10. .
  • the GDC 20 When receiving the input data Di including the command signal S1 from the meter microcomputer 10, the GDC 20 temporarily writes the input data Di into the RAM 25.
  • the GDC 20 When outputting the output data Do including the command signal S2 to the display 30, the GDC 20 temporarily writes the output data Do to the RAM 25.
  • the GDC 20 includes a first error detection unit 21 and a first error information writing unit 22 as functions.
  • the first error detection unit 21 detects that an error relating to the GDC 20 has occurred.
  • the first error information writing unit 22 writes the first error information Er1 into the flash ROM 50 when the first error detection unit 21 detects that an error has occurred.
  • the first error information Er1 includes indices Idx0 to Idxn (n is an arbitrary natural number) assigned with a number for each error, an error IDEid, and an ODO value Iod as timing information indicating an error occurrence timing.
  • Status information Ist indicating the status at the time of error.
  • the status information Ist includes, for example, input data Di at the time of error, output data Do at the time of error, processing contents Ipr of the GDC 20 at the time of error, and memory usage rate Imu of the work area (RAM 25) at the time of error.
  • the GDC 20 stores the first error information Er1 in the first storage area 51 of the flash ROM 50 every time an error occurs, as shown in FIG. Then, as shown in FIG. 5B, the GDC 20 stores the first error information Er1 in the second storage area 52 of the flash ROM 50 every time an error occurs, after the free space in the first storage area 51 of the flash ROM 50 is exhausted. I will remember.
  • the GDC 20 erases the data in the first storage area 51 when the free space in the second storage area 52 reaches a predetermined value, for example, 50%, as shown in FIG. Then, as shown in FIG.
  • the GDC 20 stores the first error information Er1 in the first storage area 51 again, When the free space in the first storage area 51 reaches a predetermined value, for example, 50%, the data in the second storage area 52 is deleted. Thereafter, FIGS. 5A to 5D are repeated. Thus, the first error information Er1 written in the flash ROM 50 can be protected.
  • the error information writing process executed by the first error information writing unit 22 is repeatedly executed when the power supply of the vehicle display device 1 is turned on.
  • the first error information writing unit 22 waits until the first error detection unit 21 detects that an error has occurred (step S101; NO).
  • the first error information writing unit 22 recognizes the type of error related to the GDC 20, that is, the error IDEid (step S102).
  • the error relating to the GDC 20 includes, for example, a communication error between the meter microcomputer 10 and the GDC 20, a stop of the processing of the GDC 20, a failure to write a desired image on the display 30, and the like.
  • the first error information writing unit 22 reads out the ODO value Iod stored in the EEPROM 40 at the time of an error via the meter microcomputer 10 (Step S103). Then, the first error information writing unit 22 reads the error input data Di input from the meter microcomputer 10 to the GDC 20 from the RAM 25 (step S104), and outputs the error output data Do output from the GDC 20 to the display 30. The data is read from the RAM 25 (step S105). Next, the first error information writing unit 22 recognizes the processing content Ipr of the GDC 20 at the time of error (step S106). The processing content Ipr of the GDC 20 includes information such as a combination of a process and a program that were being executed when the error occurred. Then, the first error information writing unit 22 recognizes the memory usage rate Imu of the work area (RAM 25) at the time of the error (Step S107).
  • the first error information writing unit 22 stores the error IDEid, the ODO value Iod, the input data Di, the output data Do, the processing content Ipr of the GDC 20, and the work area memory corresponding to the type of error acquired in steps S102 to S107 described above.
  • the first error information Er1 including the usage rate Imu is generated, and the generated first error information Er1 is written to the flash ROM 50 (step S108).
  • the first error information writing unit 22 attaches the unused indexes Idx0 to Idxn in the first error information Er1 already stored in the flash ROM 50 to the new first error information Er1. For example, when all the indexes Idx0 to Idxn are used, the new first error information Er1 is overwritten on the first error information Er1 having the smallest ODO value Iod. This is the end of the error information writing process.
  • the first error information Er1 including the input data Di and the like at that time is written to the flash ROM 50. Therefore, input data Di etc. that cannot be included in the supplementary information Iad of the second error information Er2 can be written in the flash ROM 50.
  • the first error information Er1 and the second error information Er2 are read by an external computer (not shown) when specifying the cause of the error.
  • the cause of the error is specified by comparing various types of information included in the first error information Er1 and the second error information Er2.
  • the vehicle display device 1 includes a display 30 that is an example of a display element that displays an image indicating vehicle information, a GDC 20 that is an example of an image processing unit that performs image processing for displaying an image on the display 30, A flash ROM 50, which is an example of a first storage unit in which one error information Er1 is stored, and a meter microcomputer 10 that causes the GDC 20 to perform image processing by outputting a command signal S2 to the GDC 20.
  • the GDC 20 includes a first error detection unit 21 that detects that an error relating to the GDC 20 has occurred, and an error IDEid that indicates a type of the error when the first error detection unit 21 detects that the error has occurred.
  • the first error information Er1 includes the error IDEid, the ODO value Iod, and the status information Ist. Therefore, by reading the first error information Er1, it becomes easy to specify the cause of the error.
  • the GDC 20 that performs image processing is provided separately from the meter microcomputer 10. In this case, since the GDC 20 and the meter microcomputer 10 perform control in cooperation with each other, the causes of errors are more likely to be various than in the configuration in which the meter microcomputer also performs image processing. Therefore, in such a configuration, as described above, it is particularly useful to easily specify the cause of the error using the first error information Er1.
  • the first error information writing unit 22 uses the input data Di when the GDC 20 has an error, the output data Do when the GDC 20 has an error, the processing content Ipr when the GDC 20 has an error, and the use of the memory of the work area of the GDC 20 when an error has occurred.
  • the rate Imu is included in the first error information Er1 as status information Ist.
  • the first error information Er1 includes the input data Di at the time of error, the output data Do, the processing content Ipr of the GDC 20, and the memory usage rate Imu of the work area as the status information Ist. Therefore, it is easy to identify the cause of the error by analyzing the input data Di at the time of the error.
  • the vehicle display device 1 includes an EEPROM 40 that is an example of a second storage unit that stores the second error information Er2.
  • the meter microcomputer 10 includes a second error detection unit 11 that detects that an error relating to the meter microcomputer 10 has occurred, and an error IDEid and an error occurrence timing when the second error detection unit 11 detects that an error has occurred.
  • a second error information writing unit 12 that writes second error information Er2 including an ODO value Iod, which is timing information indicating the above, into the EEPROM 40. According to this configuration, an error relating to the meter microcomputer 10 is written to the EEPROM 40 as the second error information Er2. Therefore, by analyzing the first error information Er1 and the second error information Er2, it becomes easy to specify the cause of the error.
  • the cause of the communication error can be analyzed from both the GDC 20 and the meter microcomputer 10.
  • the meter microcomputer 10 includes the second error detection unit 11 and the second error information writing unit 12, but the second error detection unit 11 and the second error information writing unit 12 may be omitted. Good.
  • the status information Ist included in the first error information Er1 includes the input data Di, the output data Do, the processing content Ipr of the GDC 20, and the memory usage rate Imu of the work area.
  • the present invention is not limited to this, and at least one of the input data Di, the output data Do, the processing content Ipr of the GDC 20, and the memory usage rate Imu of the work area may be omitted in the status information Ist.
  • the first error information writing unit 22 may include the temperature at the time of error detected by a temperature sensor (not shown) incorporated in the GDC 20 as the status information Ist in the first error information Er1.
  • the vehicle display device 1 includes the TFT liquid crystal display 30 as a display element, but is not limited thereto, and may include an organic EL (Electro-Luminescence) display as a display element. .
  • organic EL Electro-Luminescence
  • the first error information Er1 includes the ODO value Iod as the timing information indicating the error occurrence timing.
  • the timing information indicating the error occurrence timing is not limited to the ODO value Iod. The time to measure may be used.
  • the vehicle display device 1 is a vehicle instrument, but may be a head-up display device.
  • the display 30 is a display element that emits display light, and the display light is projected on a windshield or a combiner to display a virtual image.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
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Abstract

The present invention provides a vehicle display device that facilitates identifying the cause of an error. A vehicle display device (1) comprises a display (30) for presenting an image for showing vehicle information, a GDC (20) for displaying an image on the display (30), a flash ROM (50) that stores first error information (Er1), and a gauge microcomputer (10) that outputs a command signal (S2) to the GDC (20) to thereby cause the GDC (20) to perform image processing. The GDC (20) is provided with a first error detection unit (21) for detecting an error associated with the GDC (20), and a first error information write unit (22) for, when the first-error detection unit (21) detects the occurrence of an error, writing into the flash memory (50) first error information (Er1) including an error type, an ODO value that indicates error occurrence time, and status information that indicates the status when the error occurs.

Description

車両用表示装置Display device for vehicles
　本発明は、車両用表示装置に関する。 The present invention relates to a display device for a vehicle.
　従来から、車両情報を表示する車両用表示装置が知られている。例えば、特許文献１に記載の表示装置は、液晶パネルに画像を表示させるための処理を行うＧＤＣ（Graphic Display Controller）と、表示装置全体の制御を行うマイコンと、を備える。
　また、例えば、特許文献２に記載されるように、車両の走行距離を記憶する記憶手段と、記憶手段に記憶される走行距離を更新するとともにエラーが発生したことを示すエラーコードを記憶手段に記憶させる制御手段と、を備える。 Conventionally, a vehicle display device that displays vehicle information has been known. For example, the display device described in Patent Literature 1 includes a GDC (Graphic Display Controller) that performs processing for displaying an image on a liquid crystal panel, and a microcomputer that controls the entire display device.
Further, for example, as described in Patent Document 2, a storage unit that stores a mileage of a vehicle, an mileage stored in the storage unit is updated, and an error code indicating that an error has occurred is stored in the storage unit. And control means for storing.
特開２０１４－２５７９２号公報JP 2014-25792A 特開平５－３２２５９４号公報JP-A-5-322594
　上記特許文献１の車両用表示装置においては、ＧＤＣとマイコンが協調しつつ制御することにより表示制御が行われる。よって、車両用表示装置の構成、制御及び通信内容が複雑になっている。このため、車両用表示装置がエラーにより動かなくなった場合に、特許文献２に記載されるエラーが発生したことを示すエラーコードを記憶させるだけでは、エラーの原因を特定することが困難であった。 In the vehicle display device of Patent Document 1, display control is performed by controlling the GDC and the microcomputer in cooperation. Therefore, the configuration, control, and communication contents of the vehicle display device are complicated. For this reason, when the display device for a vehicle stops operating due to an error, it is difficult to specify the cause of the error only by storing the error code indicating that the error described in Patent Document 2 has occurred. .
　本発明は、上記実状を鑑みてなされたものであり、エラーの原因を特定することが容易となる車両用表示装置を提供することを目的とする。 The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a vehicle display device that makes it easy to identify the cause of an error.
　上記目的を達成するため、本発明に係る車両用表示装置は、車両情報を示す画像を表示する表示素子と、前記表示素子に前記画像を表示させる画像処理を行う画像処理部と、第１エラー情報が記憶される第１記憶部と、指令信号を前記画像処理部に出力することにより前記画像処理部に前記画像処理を行わせるメータマイコンと、を備え、前記画像処理部は、前記画像処理部に関するエラーが発生したことを検出する第１エラー検出部と、前記第１エラー検出部によりエラーが発生したことが検出されたとき、エラーの種類、エラーの発生タイミングを示すタイミング情報、及びエラー時の状況を示す状況情報を含む前記第１エラー情報を前記第１記憶部に書き込む第１エラー情報書き込み部と、を備える。 In order to achieve the above object, a display device for a vehicle according to the present invention includes: a display element that displays an image indicating vehicle information; an image processing unit that performs image processing for displaying the image on the display element; A first storage unit in which information is stored; and a meter microcomputer that causes the image processing unit to perform the image processing by outputting a command signal to the image processing unit, wherein the image processing unit includes the image processing unit. A first error detection unit for detecting that an error relating to the unit has occurred, and when the first error detection unit detects that an error has occurred, a type of error, timing information indicating an error occurrence timing, and an error A first error information writing unit that writes the first error information including status information indicating a time status into the first storage unit.
　本発明によれば、車両用表示装置において、エラーの原因を特定することが容易となる。 According to the present invention, it is easy to identify the cause of the error in the vehicle display device.
本発明の一実施形態に係る車両用表示装置のブロック図である。It is a block diagram of the display for vehicles concerning one embodiment of the present invention. 本発明の一実施形態に係る第２エラー情報を示す図である。FIG. 7 is a diagram illustrating second error information according to an embodiment of the present invention. 本発明の一実施形態に係る第１エラー情報を示す図である。FIG. 5 is a diagram illustrating first error information according to an embodiment of the present invention. 本発明の一実施形態に係るエラー情報書き込み処理の手順を示すフローチャートである。9 is a flowchart illustrating a procedure of an error information writing process according to an embodiment of the present invention. 本発明の一実施形態に係る（ａ）～（ｄ）は、フラッシュＲＯＭの記憶領域を模式的に示す図である。(A) to (d) according to an embodiment of the present invention are diagrams schematically showing a storage area of a flash ROM.
　本発明に係る車両用表示装置の一実施形態について、図面を参照して説明する。
　図１に示すように、車両用表示装置１は、メータマイコン１０と、ＧＤＣ２０と、ＲＡＭ（Random Access Memory）１５，２５と、ディスプレイ３０と、ＥＥＰＲＯＭ（Electrically Erasable Programmable Read-Only Memory）４０と、フラッシュＲＯＭ（Read-Only Memory）５０と、を備える。車両用表示装置１は、車両速度等の車両情報を表示する車両計器である。 An embodiment of a vehicle display device according to the present invention will be described with reference to the drawings.
As shown in FIG. 1, the vehicle display device 1 includes a meter microcomputer 10, a GDC 20, RAMs (Random Access Memory) 15 and 25, a display 30, an EEPROM (Electrically Erasable Programmable Read-Only Memory) 40, A flash ROM (Read-Only Memory) 50. The vehicle display device 1 is a vehicle instrument that displays vehicle information such as a vehicle speed.
　ディスプレイ３０は、表示素子に相当し、例えば、ＴＦＴ（Thin Film Transistor）型の液晶ディスプレイである。ディスプレイ３０は、ＧＤＣ２０からの指令信号Ｓ２を受けて車両情報を示す画像を表示する。 The display 30 corresponds to a display element, and is, for example, a TFT (Thin Film Transistor) type liquid crystal display. Display 30 receives command signal S2 from GDC 20, and displays an image indicating vehicle information.
　ＲＡＭ１５は、メータマイコン１０に接続され、メータマイコン１０のワークエリアとしてメータマイコン１０の処理実行時に使用される。また、ＲＡＭ２５は、ＧＤＣ２０に接続され、ＧＤＣ２０のワークエリアとしてＧＤＣ２０の処理実行時に使用される。 The RAM 15 is connected to the meter microcomputer 10 and is used as a work area of the meter microcomputer 10 when the meter microcomputer 10 executes processing. The RAM 25 is connected to the GDC 20 and is used as a work area of the GDC 20 when the GDC 20 performs processing.
　ＥＥＰＲＯＭ４０は、メータマイコン１０に接続され、第２エラー情報Ｅｒ２と車両の積算走行距離を示すＯＤＯ値が記憶されている。 The EEPROM 40 is connected to the meter microcomputer 10 and stores the second error information Er2 and the ODO value indicating the integrated traveling distance of the vehicle.
　フラッシュＲＯＭ５０は、ＧＤＣ２０に接続され、第１エラー情報Ｅｒ１が記憶されている。フラッシュＲＯＭ５０は、ＥＥＰＲＯＭ４０よりも記憶容量が大きい。 The flash ROM 50 is connected to the GDC 20, and stores the first error information Er1. The flash ROM 50 has a larger storage capacity than the EEPROM 40.
　メータマイコン１０は、車両用表示装置１全体を制御するＣＰＵ（Central Processing Unit)等からなるマイクロコンピュータであり、ＧＤＣ２０、ＥＥＰＲＯＭ４０、ＲＡＭ１５及びＣＡＮ（Controller Area Network）に接続されている。メータマイコン１０は、ＣＡＮを介して車両情報を受けて、ＧＤＣ２０に画像処理を指令する指令信号Ｓ１を出力する。メータマイコン１０は、機能として、第２エラー検出部１１と、第２エラー情報書き込み部１２と、ＯＤＯ値更新部１３と、を備える。ＯＤＯ値更新部１３は、走行距離に応じたパルス信号を車両情報として取得し、取得したパルス信号に応じてＥＥＰＲＯＭ４０に記憶されるＯＤＯ値を更新する。 The meter microcomputer 10 is a microcomputer including a CPU (Central Processing Unit) for controlling the entire vehicle display device 1, and is connected to the GDC 20, the EEPROM 40, the RAM 15, and a CAN (Controller Area Network). The meter microcomputer 10 receives the vehicle information via the CAN and outputs a command signal S1 for commanding the GDC 20 to perform image processing. The meter microcomputer 10 includes a second error detecting unit 11, a second error information writing unit 12, and an ODO value updating unit 13 as functions. The ODO value updating unit 13 acquires a pulse signal corresponding to the traveling distance as vehicle information, and updates the ODO value stored in the EEPROM 40 according to the acquired pulse signal.
　第２エラー検出部１１は、メータマイコン１０に関するエラーが発生したことを検出する。第２エラー情報書き込み部１２は、第２エラー検出部１１によりエラーが発生したことが検出されたとき、第２エラー情報Ｅｒ２をＥＥＰＲＯＭ４０に書き込む。図２に示すように、第２エラー情報Ｅｒ２は、エラー毎に数字が付されるインデックスＩｄｘ０～Ｉｄｘｎ（ｎは任意の自然数）、エラーの種類を示すエラーＩＤ（Identification）Ｅｉｄ、エラー時のＯＤＯ値Ｉｏｄ及び付帯情報Ｉａｄが含まれている。メータマイコン１０に関するエラーは、例えば、メータマイコン１０とＧＤＣ２０の間の通信エラー、メータマイコン１０の処理が止まる等である。付帯情報Ｉａｄは、例えば、４Ｂｙｔｅまでのデータからなり、エラーＩＤＥｉｄよりも更に詳細なエラー情報を含ませるために任意で設定される。 (4) The second error detection unit 11 detects that an error relating to the meter microcomputer 10 has occurred. The second error information writing unit 12 writes the second error information Er2 into the EEPROM 40 when the second error detection unit 11 detects that an error has occurred. As shown in FIG. 2, the second error information Er2 includes indexes Idx0 to Idxn (n is an arbitrary natural number) assigned with a number for each error, an error ID (Identification) Eid indicating the type of error, and an ODO at the time of error. A value Iod and incidental information Iad are included. An error relating to the meter microcomputer 10 is, for example, a communication error between the meter microcomputer 10 and the GDC 20, a stop of the processing of the meter microcomputer 10, and the like. The additional information Iad includes, for example, data of up to 4 bytes, and is arbitrarily set to include more detailed error information than the error IDEid.
　図１に示すように、ＧＤＣ２０は、画像処理部に相当し、メータマイコン１０からの指令信号Ｓ１に基づき、ディスプレイ３０に指令信号Ｓ２を出力することによりディスプレイ３０の画像を描画する画像処理を行う。
　ＧＤＣ２０は、メータマイコン１０から指令信号Ｓ１を含む入力データＤｉを受けると、その入力データＤｉを一時的にＲＡＭ２５に書き込む。また、ＧＤＣ２０は、ディスプレイ３０に指令信号Ｓ２を含む出力データＤｏを出力する際、その出力データＤｏを一時的にＲＡＭ２５に書き込む。
　ＧＤＣ２０は、機能として、第１エラー検出部２１と、第１エラー情報書き込み部２２と、を備える。第１エラー検出部２１は、ＧＤＣ２０に関するエラーが発生したことを検出する。第１エラー情報書き込み部２２は、第１エラー検出部２１によりエラーが発生したことが検出されたとき、第１エラー情報Ｅｒ１をフラッシュＲＯＭ５０に書き込む。第１エラー情報Ｅｒ１は、図３に示すように、エラー毎に数字が付されるインデックスＩｄｘ０～Ｉｄｘｎ（ｎは任意の自然数）、エラーＩＤＥｉｄ、エラーの発生タイミングを示すタイミング情報であるＯＤＯ値Ｉｏｄ、エラー時の状況を示す状況情報Ｉｓｔを含む。この状況情報Ｉｓｔは、例えば、エラー時の入力データＤｉ、エラー時の出力データＤｏ、エラー時のＧＤＣ２０の処理内容Ｉｐｒ、及びエラー時のワークエリア（ＲＡＭ２５）のメモリ使用率Ｉｍｕを含む。 As shown in FIG. 1, the GDC 20 corresponds to an image processing unit, and performs image processing for drawing an image on the display 30 by outputting a command signal S2 to the display 30 based on a command signal S1 from the meter microcomputer 10. .
When receiving the input data Di including the command signal S1 from the meter microcomputer 10, the GDC 20 temporarily writes the input data Di into the RAM 25. When outputting the output data Do including the command signal S2 to the display 30, the GDC 20 temporarily writes the output data Do to the RAM 25.
The GDC 20 includes a first error detection unit 21 and a first error information writing unit 22 as functions. The first error detection unit 21 detects that an error relating to the GDC 20 has occurred. The first error information writing unit 22 writes the first error information Er1 into the flash ROM 50 when the first error detection unit 21 detects that an error has occurred. As shown in FIG. 3, the first error information Er1 includes indices Idx0 to Idxn (n is an arbitrary natural number) assigned with a number for each error, an error IDEid, and an ODO value Iod as timing information indicating an error occurrence timing. , Status information Ist indicating the status at the time of error. The status information Ist includes, for example, input data Di at the time of error, output data Do at the time of error, processing contents Ipr of the GDC 20 at the time of error, and memory usage rate Imu of the work area (RAM 25) at the time of error.
　次に、図５（ａ）～（ｄ）に示すように、ＧＤＣ２０によるフラッシュＲＯＭ５０への第１エラー情報Ｅｒ１の記憶方法について説明する。
　ＧＤＣ２０は、図５（ａ）に示すように、エラー発生毎に第１エラー情報Ｅｒ１をフラッシュＲＯＭ５０の第１記憶領域５１に記憶していく。そして、ＧＤＣ２０は、図５（ｂ）に示すように、フラッシュＲＯＭ５０の第１記憶領域５１の空き容量がなくなった後、エラー発生毎に第１エラー情報Ｅｒ１をフラッシュＲＯＭ５０の第２記憶領域５２に記憶していく。ＧＤＣ２０は、図５（ｃ）に示すように、第２記憶領域５２の空き容量が所定値、例えば５０％となったときに、第１記憶領域５１のデータを消去する。そして、ＧＤＣ２０は、図５（ｄ）に示すように、フラッシュＲＯＭ５０の第２記憶領域５２の空き容量がなくなったときに、再び第１記憶領域５１に第１エラー情報Ｅｒ１を記憶していき、第１記憶領域５１の空き容量が所定値、例えば５０％となったときに、第２記憶領域５２のデータを消去する。以降、図５（ａ）～（ｄ）が繰り返される。これにより、フラッシュＲＯＭ５０に書き込まれた第１エラー情報Ｅｒ１を保護することができる。 Next, as shown in FIGS. 5A to 5D, a method of storing the first error information Er1 in the flash ROM 50 by the GDC 20 will be described.
The GDC 20 stores the first error information Er1 in the first storage area 51 of the flash ROM 50 every time an error occurs, as shown in FIG. Then, as shown in FIG. 5B, the GDC 20 stores the first error information Er1 in the second storage area 52 of the flash ROM 50 every time an error occurs, after the free space in the first storage area 51 of the flash ROM 50 is exhausted. I will remember. The GDC 20 erases the data in the first storage area 51 when the free space in the second storage area 52 reaches a predetermined value, for example, 50%, as shown in FIG. Then, as shown in FIG. 5D, when the free space in the second storage area 52 of the flash ROM 50 runs out, the GDC 20 stores the first error information Er1 in the first storage area 51 again, When the free space in the first storage area 51 reaches a predetermined value, for example, 50%, the data in the second storage area 52 is deleted. Thereafter, FIGS. 5A to 5D are repeated. Thus, the first error information Er1 written in the flash ROM 50 can be protected.
　次に、図４を参照しつつ、第１エラー情報書き込み部２２により実行されるエラー情報書き込み処理について説明する。このエラー情報書き込み処理は、車両用表示装置１の電源がオンのときに繰り返し実行される。
　まず、第１エラー情報書き込み部２２は、第１エラー検出部２１によりエラーが発生したことが検出されるのを待つ（ステップＳ１０１；ＮＯ）。第１エラー情報書き込み部２２は、第１エラー検出部２１によりエラーが発生したことが検出されたとき（ステップＳ１０１；ＹＥＳ）、ＧＤＣ２０に関するエラーの種類、すなわちエラーＩＤＥｉｄを認識する（ステップＳ１０２）。ＧＤＣ２０に関するエラーは、例えば、メータマイコン１０とＧＤＣ２０の間の通信エラー、ＧＤＣ２０の処理が止まる、ディスプレイ３０に所望の画像を書き込めない等である。 Next, an error information writing process executed by the first error information writing unit 22 will be described with reference to FIG. This error information writing process is repeatedly executed when the power supply of the vehicle display device 1 is turned on.
First, the first error information writing unit 22 waits until the first error detection unit 21 detects that an error has occurred (step S101; NO). When the first error detection unit 21 detects that an error has occurred (step S101; YES), the first error information writing unit 22 recognizes the type of error related to the GDC 20, that is, the error IDEid (step S102). The error relating to the GDC 20 includes, for example, a communication error between the meter microcomputer 10 and the GDC 20, a stop of the processing of the GDC 20, a failure to write a desired image on the display 30, and the like.
　第１エラー情報書き込み部２２は、メータマイコン１０を介して、エラー時においてＥＥＰＲＯＭ４０に記憶されるＯＤＯ値Ｉｏｄを読み出す（ステップＳ１０３）。そして、第１エラー情報書き込み部２２は、メータマイコン１０からＧＤＣ２０に入力されるエラー時の入力データＤｉをＲＡＭ２５から読み出し（ステップＳ１０４）、ＧＤＣ２０からディスプレイ３０に出力されるエラー時の出力データＤｏをＲＡＭ２５から読み出す（ステップＳ１０５）。
　次に、第１エラー情報書き込み部２２は、エラー時のＧＤＣ２０の処理内容Ｉｐｒを認識する（ステップＳ１０６）。ＧＤＣ２０の処理内容Ｉｐｒは、エラーが発生したときに実行されていた処理及びプログラムの組み合わせ等の情報を含む。そして、第１エラー情報書き込み部２２は、エラー時のワークエリア（ＲＡＭ２５）のメモリ使用率Ｉｍｕを認識する（ステップＳ１０７）。 The first error information writing unit 22 reads out the ODO value Iod stored in the EEPROM 40 at the time of an error via the meter microcomputer 10 (Step S103). Then, the first error information writing unit 22 reads the error input data Di input from the meter microcomputer 10 to the GDC 20 from the RAM 25 (step S104), and outputs the error output data Do output from the GDC 20 to the display 30. The data is read from the RAM 25 (step S105).
Next, the first error information writing unit 22 recognizes the processing content Ipr of the GDC 20 at the time of error (step S106). The processing content Ipr of the GDC 20 includes information such as a combination of a process and a program that were being executed when the error occurred. Then, the first error information writing unit 22 recognizes the memory usage rate Imu of the work area (RAM 25) at the time of the error (Step S107).
　第１エラー情報書き込み部２２は、上述したステップＳ１０２～Ｓ１０７にて取得したエラーの種類に対応するエラーＩＤＥｉｄ、ＯＤＯ値Ｉｏｄ、入力データＤｉ、出力データＤｏ及びＧＤＣ２０の処理内容Ｉｐｒ、ワークエリアのメモリ使用率Ｉｍｕを含む第１エラー情報Ｅｒ１を生成し、生成した第１エラー情報Ｅｒ１をフラッシュＲＯＭ５０に書き込む（ステップＳ１０８）。このとき、第１エラー情報書き込み部２２は、フラッシュＲＯＭ５０にすでに記憶されている第１エラー情報Ｅｒ１において使用されていないインデックスＩｄｘ０～Ｉｄｘｎを新たな第１エラー情報Ｅｒ１に付する。例えば、全てのインデックスＩｄｘ０～Ｉｄｘｎが使用されている場合、新たな第１エラー情報Ｅｒ１をＯＤＯ値Ｉｏｄが最も小さい第１エラー情報Ｅｒ１に上書きする。以上で、エラー情報書き込み処理が終了となる。 The first error information writing unit 22 stores the error IDEid, the ODO value Iod, the input data Di, the output data Do, the processing content Ipr of the GDC 20, and the work area memory corresponding to the type of error acquired in steps S102 to S107 described above. The first error information Er1 including the usage rate Imu is generated, and the generated first error information Er1 is written to the flash ROM 50 (step S108). At this time, the first error information writing unit 22 attaches the unused indexes Idx0 to Idxn in the first error information Er1 already stored in the flash ROM 50 to the new first error information Er1. For example, when all the indexes Idx0 to Idxn are used, the new first error information Er1 is overwritten on the first error information Er1 having the smallest ODO value Iod. This is the end of the error information writing process.
　例えば、ディスプレイ３０に黒色の画像が表示されるエラーが発生した場合、その際の入力データＤｉ等を含む第１エラー情報Ｅｒ１がフラッシュＲＯＭ５０に書き込まれる。よって、第２エラー情報Ｅｒ２の付帯情報Ｉａｄに入りきらない入力データＤｉ等をフラッシュＲＯＭ５０に書き込むことができる。 For example, when an error that causes a black image to be displayed on the display 30 occurs, the first error information Er1 including the input data Di and the like at that time is written to the flash ROM 50. Therefore, input data Di etc. that cannot be included in the supplementary information Iad of the second error information Er2 can be written in the flash ROM 50.
　第１エラー情報Ｅｒ１及び第２エラー情報Ｅｒ２は、エラー原因を特定する際に、図示しない外部コンピュータにより読み出される。第１エラー情報Ｅｒ１及び第２エラー情報Ｅｒ２に含まれる各種情報が照らし合わされることによりエラー原因が特定される。 The first error information Er1 and the second error information Er2 are read by an external computer (not shown) when specifying the cause of the error. The cause of the error is specified by comparing various types of information included in the first error information Er1 and the second error information Er2.
　（効果）
　以上、説明した一実施形態によれば、以下の効果を奏する。 (effect)
According to the embodiment described above, the following effects can be obtained.
　（１）車両用表示装置１は、車両情報を示す画像を表示する表示素子の一例であるディスプレイ３０と、ディスプレイ３０に画像を表示させる画像処理を行う画像処理部の一例であるＧＤＣ２０と、第１エラー情報Ｅｒ１が記憶される第１記憶部の一例であるフラッシュＲＯＭ５０と、指令信号Ｓ２をＧＤＣ２０に出力することによりＧＤＣ２０に画像処理を行わせるメータマイコン１０と、を備える。ＧＤＣ２０は、ＧＤＣ２０に関するエラーが発生したことを検出する第１エラー検出部２１と、第１エラー検出部２１によりエラーが発生したことが検出されたとき、エラーの種類を示すエラーＩＤＥｉｄ、エラーの発生タイミングを示すタイミング情報であるＯＤＯ値Ｉｏｄ、エラー時の状況を示す状況情報Ｉｓｔを含む第１エラー情報Ｅｒ１をフラッシュＲＯＭ５０に書き込む第１エラー情報書き込み部２２と、を備える。
　この構成によれば、第１エラー情報Ｅｒ１には、エラーＩＤＥｉｄ、ＯＤＯ値Ｉｏｄ及び状況情報Ｉｓｔが含まれている。よって、第１エラー情報Ｅｒ１が読み出されることにより、エラーの原因を特定することが容易となる。
　特に、画像処理を行うＧＤＣ２０は、メータマイコン１０とは別に設けられる。この場合、ＧＤＣ２０とメータマイコン１０が協調して制御を行うため、メータマイコンが画像処理も行う構成に比べて、エラーの原因が多種多様となり易い。よって、このような構成のもとでは、上述のように、第１エラー情報Ｅｒ１により、エラーの原因の特定を容易とすることは特に有益である。 (1) The vehicle display device 1 includes a display 30 that is an example of a display element that displays an image indicating vehicle information, a GDC 20 that is an example of an image processing unit that performs image processing for displaying an image on the display 30, A flash ROM 50, which is an example of a first storage unit in which one error information Er1 is stored, and a meter microcomputer 10 that causes the GDC 20 to perform image processing by outputting a command signal S2 to the GDC 20. The GDC 20 includes a first error detection unit 21 that detects that an error relating to the GDC 20 has occurred, and an error IDEid that indicates a type of the error when the first error detection unit 21 detects that the error has occurred. A first error information writing unit 22 for writing, to the flash ROM 50, first error information Er1 including an ODO value Iod which is timing information indicating timing, and status information Ist indicating a status at the time of error.
According to this configuration, the first error information Er1 includes the error IDEid, the ODO value Iod, and the status information Ist. Therefore, by reading the first error information Er1, it becomes easy to specify the cause of the error.
In particular, the GDC 20 that performs image processing is provided separately from the meter microcomputer 10. In this case, since the GDC 20 and the meter microcomputer 10 perform control in cooperation with each other, the causes of errors are more likely to be various than in the configuration in which the meter microcomputer also performs image processing. Therefore, in such a configuration, as described above, it is particularly useful to easily specify the cause of the error using the first error information Er1.
　（２）第１エラー情報書き込み部２２は、ＧＤＣ２０のエラー時の入力データＤｉ、ＧＤＣ２０のエラー時の出力データＤｏ、ＧＤＣ２０のエラー時の処理内容Ｉｐｒ、及びエラー時のＧＤＣ２０のワークエリアのメモリ使用率Ｉｍｕを状況情報Ｉｓｔとして第１エラー情報Ｅｒ１に含ませる。
　この構成によれば、第１エラー情報Ｅｒ１には、状況情報Ｉｓｔとしてエラー時の入力データＤｉ、出力データＤｏ、ＧＤＣ２０の処理内容Ｉｐｒ、ワークエリアのメモリ使用率Ｉｍｕが含まれている。よって、エラー時の入力データＤｉ等を解析することにより、エラーの原因を特定することが容易となる。 (2) The first error information writing unit 22 uses the input data Di when the GDC 20 has an error, the output data Do when the GDC 20 has an error, the processing content Ipr when the GDC 20 has an error, and the use of the memory of the work area of the GDC 20 when an error has occurred. The rate Imu is included in the first error information Er1 as status information Ist.
According to this configuration, the first error information Er1 includes the input data Di at the time of error, the output data Do, the processing content Ipr of the GDC 20, and the memory usage rate Imu of the work area as the status information Ist. Therefore, it is easy to identify the cause of the error by analyzing the input data Di at the time of the error.
　（３）車両用表示装置１は、第２エラー情報Ｅｒ２が記憶される第２記憶部の一例であるＥＥＰＲＯＭ４０を備える。メータマイコン１０は、メータマイコン１０に関するエラーが発生したことを検出する第２エラー検出部１１と、第２エラー検出部１１によりエラーが発生したことが検出されたとき、エラーＩＤＥｉｄ及びエラーの発生タイミングを示すタイミング情報であるＯＤＯ値Ｉｏｄを含む第２エラー情報Ｅｒ２をＥＥＰＲＯＭ４０に書き込む第２エラー情報書き込み部１２と、を備える。
　この構成によれば、メータマイコン１０に関するエラーが第２エラー情報Ｅｒ２としてＥＥＰＲＯＭ４０に書き込まれる。よって、第１エラー情報Ｅｒ１と第２エラー情報Ｅｒ２を解析することにより、エラーの原因を特定することが容易となる。
　例えば、ＧＤＣ２０とメータマイコン１０の間で通信エラーが発生した場合、メータマイコン１０の状況が第２エラー情報Ｅｒ２として書き込まれ、ＧＤＣ２０の状況が第１エラー情報Ｅｒ１として書き込まれる。よって、通信エラーの原因をＧＤＣ２０とメータマイコン１０の両方から解析することができる。 (3) The vehicle display device 1 includes an EEPROM 40 that is an example of a second storage unit that stores the second error information Er2. The meter microcomputer 10 includes a second error detection unit 11 that detects that an error relating to the meter microcomputer 10 has occurred, and an error IDEid and an error occurrence timing when the second error detection unit 11 detects that an error has occurred. A second error information writing unit 12 that writes second error information Er2 including an ODO value Iod, which is timing information indicating the above, into the EEPROM 40.
According to this configuration, an error relating to the meter microcomputer 10 is written to the EEPROM 40 as the second error information Er2. Therefore, by analyzing the first error information Er1 and the second error information Er2, it becomes easy to specify the cause of the error.
For example, when a communication error occurs between the GDC 20 and the meter microcomputer 10, the status of the meter microcomputer 10 is written as the second error information Er2, and the status of the GDC 20 is written as the first error information Er1. Therefore, the cause of the communication error can be analyzed from both the GDC 20 and the meter microcomputer 10.
（変形例）
　なお、上記実施形態は、これを適宜変更した以下の形態にて実施することができる。 (Modification)
Note that the above embodiment can be implemented in the following form in which this is appropriately changed.
　上記実施形態においては、メータマイコン１０は、第２エラー検出部１１及び第２エラー情報書き込み部１２を備えていたが、第２エラー検出部１１及び第２エラー情報書き込み部１２は省略されてもよい。 In the above embodiment, the meter microcomputer 10 includes the second error detection unit 11 and the second error information writing unit 12, but the second error detection unit 11 and the second error information writing unit 12 may be omitted. Good.
　上記実施形態においては、第１エラー情報Ｅｒ１に含まれる状況情報Ｉｓｔは、入力データＤｉ、出力データＤｏ及びＧＤＣ２０の処理内容Ｉｐｒ及びワークエリアのメモリ使用率Ｉｍｕを含んでいた。しかし、これに限らず、状況情報Ｉｓｔにおいて、入力データＤｉ、出力データＤｏ及びＧＤＣ２０の処理内容Ｉｐｒ及びワークエリアのメモリ使用率Ｉｍｕのうち少なくとも何れかが省略されてもよい。
　また、第１エラー情報書き込み部２２は、ＧＤＣ２０に内蔵される図示しない温度センサにより検出されたエラー時の温度を状況情報Ｉｓｔとして第１エラー情報Ｅｒ１に含ませてもよい。 In the above embodiment, the status information Ist included in the first error information Er1 includes the input data Di, the output data Do, the processing content Ipr of the GDC 20, and the memory usage rate Imu of the work area. However, the present invention is not limited to this, and at least one of the input data Di, the output data Do, the processing content Ipr of the GDC 20, and the memory usage rate Imu of the work area may be omitted in the status information Ist.
Further, the first error information writing unit 22 may include the temperature at the time of error detected by a temperature sensor (not shown) incorporated in the GDC 20 as the status information Ist in the first error information Er1.
　上記実施形態においては、車両用表示装置１は、表示素子としてＴＦＴ液晶型のディスプレイ３０を備えていたが、これに限らず、表示素子として有機ＥＬ（Electro-Luminescence）ディスプレイを備えていてもよい。 In the above embodiment, the vehicle display device 1 includes the TFT liquid crystal display 30 as a display element, but is not limited thereto, and may include an organic EL (Electro-Luminescence) display as a display element. .
　上記実施形態においては、第１エラー情報Ｅｒ１は、エラーの発生タイミングを示すタイミング情報としてＯＤＯ値Ｉｏｄを含んでいたが、エラーの発生タイミングを示すタイミング情報は、ＯＤＯ値Ｉｏｄに限らず、クロックが計測する時刻であってもよい。 In the above-described embodiment, the first error information Er1 includes the ODO value Iod as the timing information indicating the error occurrence timing. However, the timing information indicating the error occurrence timing is not limited to the ODO value Iod. The time to measure may be used.
　上記実施形態においては、車両用表示装置１は、車両計器であったが、ヘッドアップディスプレイ装置であってもよい。この場合、ディスプレイ３０は表示光を照射する表示素子であり、この表示光はフロントガラス又はコンバイナに投射されることにより虚像が表示される。 In the above embodiment, the vehicle display device 1 is a vehicle instrument, but may be a head-up display device. In this case, the display 30 is a display element that emits display light, and the display light is projected on a windshield or a combiner to display a virtual image.
１　車両用表示装置
１０　メータマイコン
１１　第２エラー検出部
１２　第２エラー情報書き込み部
１３　ＯＤＯ値更新部
１５，２５　ＲＡＭ
２０　ＧＤＣ（画像処理部）
２１　第１エラー検出部
２２　第１エラー情報書き込み部
３０　ディスプレイ（表示素子）
４０　ＥＥＰＲＯＭ（第２記憶部）
５０　フラッシュＲＯＭ（第１記憶部）
Ｄｉ　入力データ
Ｄｏ　出力データ
Ｅｒ１　第１エラー情報
Ｅｒ２　第２エラー情報
Ｅｉｄ　エラーＩＤ
Ｉｄｘ０～Ｉｄｘｎ　インデックス
Ｉｏｄ　ＯＤＯ値、
Ｉｐｒ　処理内容
Ｉｓｔ　状況情報
Ｉｍｕ　メモリ使用率 REFERENCE SIGNS LIST 1 vehicle display device 10 meter microcomputer 11 second error detecting unit 12 second error information writing unit 13 ODO value updating unit 15, 25 RAM
20 GDC (image processing unit)
21 first error detection unit 22 first error information writing unit 30 display (display element)
40 EEPROM (second storage unit)
50 Flash ROM (first storage unit)
Di input data Do output data Er1 first error information Er2 second error information Eid error ID
Idx0 to Idxn Index Iod ODO value,
Ipr Process content Ist Status information Imu Memory usage

Claims (3)

  1. 　車両情報を示す画像を表示する表示素子と、
    　前記表示素子に前記画像を表示させる画像処理を行う画像処理部と、
    　第１エラー情報が記憶される第１記憶部と、
    　指令信号を前記画像処理部に出力することにより前記画像処理部に前記画像処理を行わせるメータマイコンと、を備え、
    　前記画像処理部は、
    　前記画像処理部に関するエラーが発生したことを検出する第１エラー検出部と、
    　前記第１エラー検出部によりエラーが発生したことが検出されたとき、エラーの種類、エラーの発生タイミングを示すタイミング情報、及びエラー時の状況を示す状況情報を含む前記第１エラー情報を前記第１記憶部に書き込む第１エラー情報書き込み部と、を備える、
    　車両用表示装置。     A display element for displaying an image indicating vehicle information;
    An image processing unit that performs image processing for displaying the image on the display element,
    A first storage unit in which first error information is stored;
    A meter microcomputer that causes the image processing unit to perform the image processing by outputting a command signal to the image processing unit,
    The image processing unit,
    A first error detection unit that detects that an error related to the image processing unit has occurred;
    When the first error detection unit detects that an error has occurred, the first error information including a type of the error, timing information indicating an error occurrence timing, and status information indicating a status at the time of the error is transmitted to the first error detection unit. A first error information writing unit that writes the data into one storage unit.
    Display device for vehicles.
  2. 　前記第１エラー情報書き込み部は、前記画像処理部のエラー時の入力データ、前記画像処理部のエラー時の出力データ、前記画像処理部のエラー時の処理内容、及びエラー時の前記画像処理部のワークエリアの使用率のうち少なくとも何れか一つを前記状況情報として前記第１エラー情報に含ませる、
    　請求項１に記載の車両用表示装置。     The first error information writing unit includes input data at the time of error of the image processing unit, output data at the time of error of the image processing unit, processing content of the image processing unit at the time of error, and the image processing unit at the time of error. Including at least one of the usage rates of the work area as the status information in the first error information;
    The vehicle display device according to claim 1.
  3. 　前記車両用表示装置は、第２エラー情報が記憶される第２記憶部を備え、
    　前記メータマイコンは、
    　前記メータマイコンに関するエラーが発生したことを検出する第２エラー検出部と、
    　前記第２エラー検出部によりエラーが発生したことが検出されたとき、エラーの種類及びエラーの発生タイミングを示すタイミング情報を含む前記第２エラー情報を前記第２記憶部に書き込む第２エラー情報書き込み部と、を備える、
    　請求項１又は２に記載の車両用表示装置。     The vehicle display device includes a second storage unit that stores second error information,
    The meter microcomputer includes:
    A second error detection unit that detects that an error related to the meter microcomputer has occurred;
    When the second error detection unit detects that an error has occurred, writing the second error information including timing information indicating the type of the error and the timing of the occurrence of the error in the second storage unit And a unit,
    The vehicle display device according to claim 1.
PCT/JP2019/023799 2018-06-25 2019-06-17 Vehicle display device WO2020004092A1 (en)

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JP2010173615A (en) * 2009-02-02 2010-08-12 Toyota Motor Corp Malfunction-diagnosis system and method for vehicle
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JP2018021989A (en) * 2016-08-02 2018-02-08 株式会社デンソー Video display system for vehicle

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000297443A (en) * 1999-04-15 2000-10-24 Komatsu Ltd Information control device for construction machine
JP2004284408A (en) * 2003-03-19 2004-10-14 Denso Corp Diagnosis device for vehicle
JP2010173615A (en) * 2009-02-02 2010-08-12 Toyota Motor Corp Malfunction-diagnosis system and method for vehicle
JP2011057015A (en) * 2009-09-08 2011-03-24 Nippon Seiki Co Ltd Vehicular display device
JP2014025792A (en) * 2012-07-26 2014-02-06 Yazaki Corp Display device
JP2018021989A (en) * 2016-08-02 2018-02-08 株式会社デンソー Video display system for vehicle

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