JP2007137300A - On-vehicle electronic apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an on-vehicle electronic apparatus capable of speedily putting off a display device after all file names are scroll-displayed even when the file names are long. <P>SOLUTION: This on-vehicle electronic apparatus 1 is furnished with the display device 7, a reading part 8 to read file name information from a recording medium 12 in which the file name information is recorded, a system controller 2 to generate a display control signal in accordance with the file name information read by the reading part 8 and a display driver 6 to scroll-display the file names on the display device 7 in accordance with the display control signal output by the system controller 2 and to put off the display device 7 after specified time passes. The system controller 2 is furnished with a determining means to determine whether scroll of the file names by the display driver 6 is finished or not and a delay means to delay putting-off of the display device 7 by the display driver 6 when it is determined by the determining means that the scroll is not finished. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an in-vehicle electronic device.

  In a conventional in-vehicle audio player, information such as the name or number of a file being reproduced is displayed on a display device.

Some display devices allow the user to set the display time (see, for example, Patent Document 1). Since the display light of the display device is dazzling when traveling at night, a device that applies this to a display device of an in-vehicle audio player and turns off the display after a predetermined time has been developed.
JP 2003-344929 A

  By the way, in-vehicle audio players or the like include a display device that scrolls to display all long file names because the display screen is small.

  However, if the display is set to be turned off after a predetermined time has elapsed, there is a possibility that the display will disappear while a long file name is being scrolled.

  The subject of this invention is providing the vehicle-mounted electronic device which can light-extinguish a display apparatus rapidly, after all file names are scroll-displayed, even when a file name is long.

  In order to solve the above-described problems, the invention described in claim 1 is a display device, a reading unit that reads file name information from a recording medium in which file name information corresponding to a file is recorded, and the reading unit reads the file name information. A system controller that generates a display control signal based on the file name information, and scrolls and displays the file name on the display device based on the display control signal output by the system controller, and the display is performed after a set display time has elapsed. A display driver that turns off the device, and the system controller determines whether or not scrolling of the file name by the display driver has ended, and when the determination unit determines that the scrolling has not been completed And delay means for delaying turning off the display device by the display driver. Is a vehicle-mounted electronic equipment to be.

  According to a second aspect of the present invention, in the in-vehicle electronic device according to the first aspect, the system controller causes the display driver to turn off the display device when the determination unit determines the end of scrolling. It further comprises an extinguishing means for performing.

  According to the present invention, even when the file name is long, all the file names can be scroll-displayed. Further, the display device can be turned off immediately after scrolling all the file names.

  The best mode for carrying out the present invention will be described below with reference to the drawings. However, although various technically preferable limitations for implementing the present invention are given to the embodiments described below, the scope of the invention is not limited to the following embodiments and illustrated examples.

[First Embodiment]
FIG. 1 is a block diagram of the in-vehicle electronic device 1 according to the first embodiment of the present invention, and FIG. 2 is a front view of the in-vehicle electronic device 1. This in-vehicle electronic device 1 is an audio player.

  The in-vehicle electronic device 1 includes a system controller 2, a RAM 3, a ROM 4, an input unit 5, a display driver 6, a display device 7, a reading unit 8, a codec 9, an amplifier 10, and a speaker 11. Prepare.

The recording medium 12 is a compact disk, a hard disk, or a semiconductor recording medium, and is a recording medium that can be read by the reading unit 8. For example, an MP3 format audio file is recorded on the recording medium 12, and file name information corresponding to each audio file is recorded.
The reading unit 8 is driven by the system controller 2, reads information recorded on the recording medium 12, outputs an audio file to the codec 9, and outputs corresponding file name information to the system controller 2.

  The codec 9 is driven by the system controller 2, expands and analogizes the audio file read by the reading unit 8, and outputs an audio signal to the amplifier 10. The amplifier 10 amplifies the audio signal input from the codec 9 and outputs it to the speaker 11. The speaker 11 is an electroacoustic converter that converts the audio signal input from the amplifier 10 into sound, and outputs sound according to the audio signal input from the amplifier 10.

The display device 7 is provided in front of the in-vehicle electronic device 1 and is a display device such as a liquid crystal display or an electroluminescence display.
The display driver 6 drives the display device 7 in accordance with the display control information input from the system controller 2. For example, the display driver 6 receives display control information such as a file name corresponding to an audio file being played back and a playback time from the system controller 2, and the display driver 6 sends a file name to the display device 7 based on the display control information. And playback time.

Further, when a scroll start signal is input from the system controller 2, the display driver 6 causes the display device 7 to start scroll display. When the scroll display by the display device 7 ends, an end signal is output to the system controller 2.
In addition, the display driver 6 turns off the display device 7 when a turn-off signal is input from the turn-off means.

Further, the display driver 6 includes a timer circuit. A clock signal is input from the system controller 2 to the timer circuit, and time is measured based on the clock signal until a predetermined time (for example, 5 seconds, hereinafter referred to as “display time”). When display control information is input from the system controller 2 to the display driver 6, the timer circuit starts measuring time. When the display time has elapsed since the start of time measurement, the timer circuit outputs an overflow signal to the system controller 2.
When a delay signal is input from the system controller 2 to the timer circuit, the timer circuit is reset and counts again until a predetermined time elapses.

  The system controller 2 has a CPU and the like, and performs overall control of the in-vehicle electronic device 1 according to a program stored in the ROM 4. For example, the system controller 2 generates display control information for displaying the file name on the display device 7 based on the file name information input from the reading unit 8 and outputs the display control information to the display driver 6. Further, the system controller 2 outputs a scroll start signal for causing the display driver 6 to start scroll display.

Furthermore, the system controller 2 includes determination means, delay means, and extinguishing means.
The determination unit determines whether or not the scrolling of the file name has ended by detecting an end signal input from the display driver 6.
The delay unit outputs a delay signal for resetting the timer circuit to the display driver 6 when the determination unit determines that the scrolling is not completed.

  The turn-off means outputs a turn-off signal to the display driver 6 when the end of scrolling is determined by the determination means. When the scroll function described later is invalid, the extinguishing means outputs an extinguishing signal to the display driver 6 when the system controller 2 detects an overflow signal input from the display driver 6.

  The RAM 3 provides a work area for the system controller 2 and temporarily stores data such as processing results generated when the system controller 2 executes a program in the work area. For example, the RAM 3 temporarily stores the file name information of the file being reproduced.

  The ROM 4 stores programs and data that can be read and executed by the system controller 2.

  The input unit 5 is provided in front of the in-vehicle electronic device 1, has various input keys and an input dial, and outputs an operation signal corresponding to the operation of the input key and the input dial to the system controller 2. As shown in FIG. 2, the input unit 5 includes input keys such as a cross key 51, a scroll key 52, a display off key 53, preset keys 54 a to 54 f, and an input dial such as a volume dial 55.

  The scroll key 52 enables a scroll function for scrolling and displaying the file name on the display device 7 when the file name displayed on the display device 7 is long at the start or during the reproduction of the audio file. When the scroll key 52 is pressed once, the scroll function is enabled, and the display driver 6 drives the display device 7 to scroll the file name. When the scroll key 52 is pressed again, the display driver 6 drives the display device 7 again to scroll the file name.

The display turn-off key 53 is used to change whether the turn-off function of the display driver 6 is valid. Here, the turn-off function is a function for displaying the name of the file being played on the display device 7 after any key operation, and turning off the display device 7 after the display time has elapsed. When the display turn-off key 53 is pressed once, the turn-off function is enabled, and the display driver 6 displays the file name, playback time, etc. corresponding to the start of playback of the audio file on the display device 7 and counts the time by the timer circuit. Start. The timer circuit outputs an overflow signal to the system controller 2 after measuring the display time. The system controller 2 to which the overflow signal is input outputs a turn-off signal to the display driver 6 by the turn-off means. The display driver 6 to which the turn-off signal is input turns off the display device 7.
On the other hand, when the display turn-off key 53 is pressed again, the turn-off function is disabled, and the display driver 6 continues to display the file name, playback time, etc. on the display device 7.

  If the scroll function is enabled when the extinguishing function is valid, the display driver 6 may extinguish the display device 7 during the scrolling because the scrolling of the file name does not end within the display time. It is done. For this reason, in the present invention, the display driver 6 turns off the display device 6 after the display driver 6 delays the turn-off, and after all the file names are scroll-displayed on the display device 7.

  For example, when the character string “Best Hits Top20 / Various Artists” is scroll-displayed on the display device 7 as the file name, the result is as shown in FIG. First, the first character string “Best Hits Top20 / V” is statically displayed (FIG. 3A). After that, when the scroll key 52 is pressed, the display of the character string starts to move to the left end, is not displayed in order from the first character, and the subsequent character string is displayed in order from the right end (FIG. 3B). All the character strings are displayed (FIG. 3C), and when the display of all the character strings is further moved to the left end and is no longer displayed, the display device 7 is turned off (FIG. 3D). This display method will be described later.

  Next, a file name display method when the scroll function is enabled when the display driver 6 is turned off will be described with reference to the flowchart of FIG. Here, FIG. 4 is a flowchart showing the flow of the process of the system controller 2 and the operation of the display driver 6 during the operation of the in-vehicle electronic device 1.

When the user operates the input unit 5 and an operation signal is input from the input unit 5 to the system controller 2, the system controller 2 causes the reading unit 8 to start reading an audio file and corresponding file name information from the storage medium. .
Then, the reading unit outputs the read audio file to the codec 9 and outputs corresponding file name information to the system controller 2.

  Next, the system controller 2 drives the codec 9, expands and analogizes the audio file input from the reading unit 8, and outputs an audio signal to the amplifier 10. The audio signal is amplified by the amplifier 10 and converted into sound by the speaker 11, thereby reproducing music recorded in the audio file.

  On the other hand, when the file name information read by the reading unit 8 is input to the system controller 2, the system controller 2 displays display control information for causing the display device 7 to display a file name corresponding to the audio file being reproduced. Output to. The display driver 6 controls the display device 7 in accordance with the display control information to statically display the file name (FIG. 3 (a), step S1). At the same time, the display driver 6 starts a timer circuit.

  When the user presses the scroll key 52, the system controller 2 outputs a scroll start signal to the display driver 6, and the display driver 6 causes the display device 7 to start scroll display. Simultaneously with the pressing of the scroll key 52, the display driver 6 resets the timer circuit and restarts (FIG. 3B, step S2).

  Next, until the overflow signal is input from the timer circuit to the system controller 2, that is, until the display time elapses, the system controller 2 causes the display driver 6 to continue scrolling display by the display device 7 (step S3; No, step S4).

  When an overflow signal is input from the timer circuit, that is, when the display time has elapsed (step S3; Yes), the system controller 2 determines whether the determination unit has detected an end signal input from the display driver 6 or not. It is determined whether or not the scrolling is finished (step S5). When the scrolling is not completed (FIG. 3C, step S5; No), the system controller 2 outputs a delay signal to the display driver 6 by the delay means. The display driver 6 to which the delay signal is input delays turning off (step S6), and the process returns to step S3.

  When scrolling ends, the display driver 6 outputs an end signal to the system driver 2. When the determination means of the system driver 2 detects an end signal input from the display driver 6 (step S5; Yes), the system driver 2 outputs a turn-off signal to the display driver 6 by the turn-off means. The display driver 6 to which the turn-off signal is input turns off the display device 7 (FIG. 3 (d), step S7).

  As described above, according to the present embodiment, the display device 7 can be normally turned off after a predetermined time has elapsed, and when the file name is long, the lighting time of the display device 7 is lengthened and the file name is The display device 7 can be turned off after all the scroll display.

  In the above embodiment, the turn-off delay of the display device 7 may be delayed by any other method.

It is a block diagram of a vehicle-mounted electronic device. It is a front view of a vehicle-mounted electronic device. It is an example of a display of a display apparatus. 5 is a flowchart showing a flow of processing of the system controller 2 and operation of the display driver 6.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle-mounted electronic device 2 System controller 6 Display driver 7 Display apparatus 8 Reading part 12 Recording medium

Claims (2)

A display device;
A reading unit that reads file name information from a recording medium in which file name information corresponding to the file is recorded;
A system controller that generates a display control signal based on the file name information read by the reading unit;
A display driver that scrolls a file name on the display device based on a display control signal output by the system controller, and turns off the display device after a set display time has elapsed.
The system controller is
Determining means for determining whether or not the scrolling of the file name by the display driver has ended;
A vehicle-mounted electronic device comprising: delay means for delaying turning off the display device by the display driver when the determination means determines that scrolling has not been completed. The system controller is
The in-vehicle electronic device according to claim 1, further comprising a light-off means that causes the display driver to turn off the display device when the determination means determines that the scrolling is finished.

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