JP6236953B2 - Vehicle display device - Google Patents

Description

  The present invention relates to a vehicle display device.

  Despite displaying multiple image functional components including image meters on a flat display, it can effectively create a sense of spatial isolation between individual image functional components and identify important meter information Patent Document 1 discloses a vehicle meter unit that is excellent in performance.

JP 2009-137486 A

  In such a vehicular display device, an image to be displayed on the display means is stored in advance in a nonvolatile memory, and if necessary, it is read and used in a volatile memory that can be read and written faster than the nonvolatile memory. It is often done. Non-volatile memory required to store display images as vehicle information increases and vehicle information increases and high-definition displays require a highly decorative display. This is one of the causes for increasing the cost of the vehicular display device.

Nonvolatile memories employed for storing display images in a vehicle display device include, for example, flash memories. The flash memory includes a NOR flash memory and a NAND flash memory.
NAND flash memory is highly integrated and inexpensive compared to NOR flash memory, but because it is easy to deteriorate due to its circuit structure, the number of rewritable times and record retention period are short. There is a possibility that the stored image may be damaged and a safe instrument display cannot be provided.
On the other hand, a NOR flash memory has a longer life and a wider operating temperature range than a NAND flash memory, has high reliability as a storage medium, and is suitable for use in a vehicle display device. However, since the price per storage capacity is expensive, there is a problem in terms of cost to secure a capacity sufficient to hold all images to be displayed.

A display unit; a non-volatile memory that holds an image; and a control unit that displays an instrument image generated by combining the first group image and the second group image stored in the non-volatile memory in the display unit in advance. , a vehicle display apparatus having a, the non-volatile memory, there are a first non-volatile memory is a NOR type flash memory, in the first non-volatile NAND flash memory storage capacity is greater than the memory A second non-volatile memory, and the first group of images is composed of an image including an image presenting vehicle information including at least a traveling speed of the vehicle and a warning symbol, and the second group of images is The total capacity is larger than that of one group of images, and is composed of images that do not include at least the vehicle running speed and warning symbols. The image is stored in advance in one non-volatile memory, and the second group of images is stored in advance in the second non-volatile memory.

(Delete)

  The image of the first group includes a simple image with a small amount of image data representing the image of the second group in a simplified manner, and the control means is configured such that any one of the images of the second group is damaged. The instrument image is generated using a simple image corresponding to the damaged image instead of the damaged image of the second group of images.

  The control means does not display the damaged image of the second group when any of the images of the second group is damaged.

  The control means displays on the display means an image notifying that any one of the images of the second group has been damaged.

  The present invention can provide a vehicle display device that is inexpensive and has high display reliability.

The front view of the display apparatus for vehicles by the embodiment of the present invention. The block diagram which shows the electrical constitution of the display apparatus for vehicles by the embodiment. The display screen 1 of the display apparatus for vehicles by the embodiment. The image preserve | saved at the 1st non-volatile memory in the display screen 1 of the display apparatus for vehicles by the embodiment. The image preserve | saved at the 2nd non-volatile memory in the display screen 1 of the display apparatus for vehicles by the embodiment. The display screen 2 of the display apparatus for vehicles by the embodiment.

  Hereinafter, a vehicle display device according to an embodiment of the present invention will be described with reference to FIGS. 1 to 6 of the accompanying drawings.

  The vehicle display device 1 according to the present embodiment includes a display unit 2, a nonvolatile memory 3, a volatile memory 4, and a control unit 5. The vehicle display device 1 performs instrument display on the display means 2 in accordance with various control signals (described later) input from the in-vehicle LAN 6 and the navigation device 7.

  As the display means 2, a flat panel display such as a liquid crystal display or an organic EL is used.

  The nonvolatile memory 3 includes a first nonvolatile memory 31 and a second nonvolatile memory 32. The nonvolatile memory 3 stores a program and image data in advance.

  The first nonvolatile memory 31 is composed of, for example, a NOR flash memory. The first non-volatile memory 31 mainly stores a control program for the control means 5 to be described later and images important for driving the vehicle to be described later.

  The second non-volatile memory 32 is composed of, for example, a NAND flash memory, and uses a memory that has a shorter storage retention period than the first non-volatile memory 31 but has a large storage capacity and can be procured at low cost. The second non-volatile memory 32 stores an image that enhances the display of the instrument display described later and an image that assists the running of the vehicle.

  The volatile memory 4 is composed of a memory that can read and write at a higher speed than a nonvolatile memory such as SDRAM (Synchronous Dynamic Random Access Memory). Temporarily hold calculation results.

  The control means 5 comprises a CPU, reads the control program and each image data from the non-volatile memory 3 into the volatile memory 4 as appropriate, and travels the vehicle, the engine speed, the shift position, the total travel distance, and route guidance information. Various information related to the vehicle such as the above is received from the in-vehicle LAN 6 or the navigation device 7 to be described later, and the information configured as the instrument image is displayed on the display means 2.

  The in-vehicle LAN 6 is a network communication network such as a CAN (Controller Area Network) in which ECUs that measure inputs from various sensors connected to the vehicle communicate vehicle information with each other.

  The navigation device 7 incorporates a GPS to detect the position of the host vehicle, calculates route guidance information to a designated point, and presents it to the occupant together with a map image. Among the route guidance information, the nearest route guidance information is transmitted to the vehicle display device 1.

  Next, the instrument image displayed on the display means 2 will be described with reference to FIGS.

  As shown in FIG. 3, the control means 5 displays the traveling speed of the vehicle, the engine speed, various warning information, the shift position, the total traveling distance received from the in-vehicle LAN 6, the traveling speed image 311, the engine speed image 312, and the warning symbol. An image 313, a shift position image 314, and a total travel distance image 315 are displayed, and the nearest route guidance information received from the navigation device is displayed as a route guidance image 323. In addition, for the purpose of decorating and producing a three-dimensional effect, the decoration ring image 321, the decoration indicator portion background image, and the perspective line image are displayed together.

  The image relating to the instrument image displayed on the display means 2 is stored separately in the first nonvolatile memory 31 and the second nonvolatile memory 32 as described later. An error correction code is assigned to each image stored in the nonvolatile memory 3.

  In the first non-volatile memory 31, as shown in FIG. 4, a traveling speed image 311, an engine speed image 312, a warning symbol image 313, a shift position image 314, and a total traveling distance image 315 are stored in advance. Many of these images are composed of vector images instead of raster images in order to reduce the capacity.

  As shown in FIG. 5, a decoration ring image 321, a decoration indicator portion background image 322, a route guidance image 323, and a perspective line image 324 are stored in the second nonvolatile memory 32 in advance.

  In addition, in preparation for when each image stored in the second nonvolatile memory 32 is damaged, a ring image 316 of a vector image obtained by simplifying the decoration ring image 321 and a decoration index unit in the first nonvolatile memory 31. An index portion background image 317 of a vector image obtained by simplifying the background image 322 is stored in advance.

The control means 5 performs error correction using an error correction code when reading an image stored in the second nonvolatile memory.
If it exceeds the range that can be corrected by the assigned error correction code, it is considered that the image is damaged. If the decoration ring 321, the decoration indicator portion background image 322, the route guidance image 323, and the perspective line image 324 are all damaged, an image damage notification image 318 is displayed as shown in FIG. If there is a corresponding simplified vector image in the volatile memory, the image is used instead of the damaged image, and if it does not exist, the damaged image is not used and is not displayed. More specifically, a ring image 316 is displayed instead of the decoration ring 321, and an index part background image 317 is displayed instead of the decoration index part background image 322. Further, the route guidance image 323 and the perspective line image 324 are not displayed.

By adopting such a configuration, it is possible to provide a vehicle display device that is inexpensive and has high display reliability.
In addition, by notifying the driver that the image has been damaged while ensuring the display necessary for traveling, the driver can be prompted to repair or replace the instrument without causing confusion.

Although the embodiment has been described above, the present invention is not limited to using a flash memory as the nonvolatile memory. For example, a magnetoresistive RAM, a resistance change type memory, a ferroelectric memory, or the like may be used.
In addition, as the images important for vehicle travel in the first non-volatile memory, the travel speed, engine speed, various warning information, shift position, and total travel distance are given as examples. You may select together.
Note that images stored in the first nonvolatile memory and the second nonvolatile memory are not limited to 2D images but may be 3D images.

DESCRIPTION OF SYMBOLS 1 Vehicle display apparatus 2 Display means 3 Non-volatile memory 31 1st non-volatile memory 311 Travel speed image 312 Engine speed image 313 Warning symbol image 314 Shift position image 315 Total travel distance image 316 Ring image 317 Indicator part background image 318 image Damage notification image 32 Second non-volatile memory 321 Decorative ring image 322 Decorative indicator background image 323 Route guidance image 324 Perspective line image 4 Volatile memory 5 Control means 6 Car LAN
7 Navigation equipment

Claims (4)

A display unit; a non-volatile memory that holds an image; and a control unit that displays an instrument image generated by combining the first group image and the second group image stored in the non-volatile memory in the display unit in advance. A vehicle display device comprising:
The non-volatile memory constitutes a first non-volatile memory is a NOR type flash memory, in the first second nonvolatile memory storage capacity than the non-volatile memory is a NAND type flash memory has a size,
The image of the first group is composed of an image including an image presenting vehicle information including at least a traveling speed of the vehicle and a warning symbol,
The second group of images has a larger total capacity than the image of the first group, and is composed of images that do not include at least the traveling speed of the vehicle and a warning symbol,
The vehicular display device, wherein the first group of images is stored in advance in a first nonvolatile memory, and the second group of images is stored in advance in the second nonvolatile memory. The first group of images includes a simple image with a small amount of image data that simply represents the second group of images,
The control means uses the simplified image corresponding to the damaged image instead of the damaged image of the second group image when any one of the images of the second group is damaged. The vehicle display device according to claim 1, wherein: Wherein, the when one of the images of the second group of image is damaged, the display device for a vehicle according to claim 1, characterized in that not displayed broken image of the second group. 4. The vehicle display device according to claim 2 , wherein the control unit displays an image notifying that any one of the images of the second group is damaged on the display unit. 5.

Images